Deleted vendor folder

5 files changed, 0 insertions, 955 deletions

diff --git a/vendor/rand_core-0.3.1/src/block.rs b/vendor/rand_core-0.3.1/src/block.rs
deleted file mode 100644
index 3045b94..0000000
--- a/vendor/rand_core-0.3.1/src/block.rs
+++ /dev/null
@@ -1,499 +0,0 @@
-// Copyright 2018 Developers of the Rand project.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! The `BlockRngCore` trait and implementation helpers
-//!
-//! The [`BlockRngCore`] trait exists to assist in the implementation of RNGs
-//! which generate a block of data in a cache instead of returning generated
-//! values directly.
-//!
-//! Usage of this trait is optional, but provides two advantages:
-//! implementations only need to concern themselves with generation of the
-//! block, not the various [`RngCore`] methods (especially [`fill_bytes`], where
-//! the optimal implementations are not trivial), and this allows
-//! `ReseedingRng` (see [`rand`](https://docs.rs/rand) crate) perform periodic
-//! reseeding with very low overhead.
-//!
-//! # Example
-//!
-//! ```norun
-//! use rand_core::block::{BlockRngCore, BlockRng};
-//!
-//! struct MyRngCore;
-//!
-//! impl BlockRngCore for MyRngCore {
-//!     type Results = [u32; 16];
-//!
-//!     fn generate(&mut self, results: &mut Self::Results) {
-//!         unimplemented!()
-//!     }
-//! }
-//!
-//! impl SeedableRng for MyRngCore {
-//!     type Seed = unimplemented!();
-//!     fn from_seed(seed: Self::Seed) -> Self {
-//!         unimplemented!()
-//!     }
-//! }
-//!
-//! // optionally, also implement CryptoRng for MyRngCore
-//!
-//! // Final RNG.
-//! type MyRng = BlockRng<u32, MyRngCore>;
-//! ```
-//!
-//! [`BlockRngCore`]: crate::block::BlockRngCore
-//! [`fill_bytes`]: RngCore::fill_bytes
-
-use core::convert::AsRef;
-use core::fmt;
-use {RngCore, CryptoRng, SeedableRng, Error};
-use impls::{fill_via_u32_chunks, fill_via_u64_chunks};
-
-/// A trait for RNGs which do not generate random numbers individually, but in
-/// blocks (typically `[u32; N]`). This technique is commonly used by
-/// cryptographic RNGs to improve performance.
-///
-/// See the [module][crate::block] documentation for details.
-pub trait BlockRngCore {
-    /// Results element type, e.g. `u32`.
-    type Item;
-
-    /// Results type. This is the 'block' an RNG implementing `BlockRngCore`
-    /// generates, which will usually be an array like `[u32; 16]`.
-    type Results: AsRef<[Self::Item]> + AsMut<[Self::Item]> + Default;
-
-    /// Generate a new block of results.
-    fn generate(&mut self, results: &mut Self::Results);
-}
-
-
-/// A wrapper type implementing [`RngCore`] for some type implementing
-/// [`BlockRngCore`] with `u32` array buffer; i.e. this can be used to implement
-/// a full RNG from just a `generate` function.
-///
-/// The `core` field may be accessed directly but the results buffer may not.
-/// PRNG implementations can simply use a type alias
-/// (`pub type MyRng = BlockRng<MyRngCore>;`) but might prefer to use a
-/// wrapper type (`pub struct MyRng(BlockRng<MyRngCore>);`); the latter must
-/// re-implement `RngCore` but hides the implementation details and allows
-/// extra functionality to be defined on the RNG
-/// (e.g. `impl MyRng { fn set_stream(...){...} }`).
-///
-/// `BlockRng` has heavily optimized implementations of the [`RngCore`] methods
-/// reading values from the results buffer, as well as
-/// calling [`BlockRngCore::generate`] directly on the output array when
-/// [`fill_bytes`] / [`try_fill_bytes`] is called on a large array. These methods
-/// also handle the bookkeeping of when to generate a new batch of values.
-///
-/// No whole generated `u32` values are thown away and all values are consumed
-/// in-order. [`next_u32`] simply takes the next available `u32` value.
-/// [`next_u64`] is implemented by combining two `u32` values, least
-/// significant first. [`fill_bytes`] and [`try_fill_bytes`] consume a whole
-/// number of `u32` values, converting each `u32` to a byte slice in
-/// little-endian order. If the requested byte length is not a multiple of 4,
-/// some bytes will be discarded.
-///
-/// See also [`BlockRng64`] which uses `u64` array buffers. Currently there is
-/// no direct support for other buffer types.
-///
-/// For easy initialization `BlockRng` also implements [`SeedableRng`].
-///
-/// [`next_u32`]: RngCore::next_u32
-/// [`next_u64`]: RngCore::next_u64
-/// [`fill_bytes`]: RngCore::fill_bytes
-/// [`try_fill_bytes`]: RngCore::try_fill_bytes
-#[derive(Clone)]
-#[cfg_attr(feature="serde1", derive(Serialize, Deserialize))]
-pub struct BlockRng<R: BlockRngCore + ?Sized> {
-    results: R::Results,
-    index: usize,
-    /// The *core* part of the RNG, implementing the `generate` function.
-    pub core: R,
-}
-
-// Custom Debug implementation that does not expose the contents of `results`.
-impl<R: BlockRngCore + fmt::Debug> fmt::Debug for BlockRng<R> {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        fmt.debug_struct("BlockRng")
-           .field("core", &self.core)
-           .field("result_len", &self.results.as_ref().len())
-           .field("index", &self.index)
-           .finish()
-    }
-}
-
-impl<R: BlockRngCore> BlockRng<R> {
-    /// Create a new `BlockRng` from an existing RNG implementing
-    /// `BlockRngCore`. Results will be generated on first use.
-    pub fn new(core: R) -> BlockRng<R>{
-        let results_empty = R::Results::default();
-        BlockRng {
-            core,
-            index: results_empty.as_ref().len(),
-            results: results_empty,
-        }
-    }
-
-    /// Get the index into the result buffer.
-    ///
-    /// If this is equal to or larger than the size of the result buffer then
-    /// the buffer is "empty" and `generate()` must be called to produce new
-    /// results.
-    pub fn index(&self) -> usize {
-        self.index
-    }
-
-    /// Reset the number of available results.
-    /// This will force a new set of results to be generated on next use.
-    pub fn reset(&mut self) {
-        self.index = self.results.as_ref().len();
-    }
-
-    /// Generate a new set of results immediately, setting the index to the
-    /// given value.
-    pub fn generate_and_set(&mut self, index: usize) {
-        assert!(index < self.results.as_ref().len());
-        self.core.generate(&mut self.results);
-        self.index = index;
-    }
-}
-
-impl<R: BlockRngCore<Item=u32>> RngCore for BlockRng<R>
-where <R as BlockRngCore>::Results: AsRef<[u32]> + AsMut<[u32]>
-{
-    #[inline(always)]
-    fn next_u32(&mut self) -> u32 {
-        if self.index >= self.results.as_ref().len() {
-            self.generate_and_set(0);
-        }
-
-        let value = self.results.as_ref()[self.index];
-        self.index += 1;
-        value
-    }
-
-    #[inline(always)]
-    fn next_u64(&mut self) -> u64 {
-        let read_u64 = |results: &[u32], index| {
-            if cfg!(any(target_arch = "x86", target_arch = "x86_64")) {
-                // requires little-endian CPU supporting unaligned reads:
-                unsafe { *(&results[index] as *const u32 as *const u64) }
-            } else {
-                let x = u64::from(results[index]);
-                let y = u64::from(results[index + 1]);
-                (y << 32) | x
-            }
-        };
-
-        let len = self.results.as_ref().len();
-
-        let index = self.index;
-        if index < len-1 {
-            self.index += 2;
-            // Read an u64 from the current index
-            read_u64(self.results.as_ref(), index)
-        } else if index >= len {
-            self.generate_and_set(2);
-            read_u64(self.results.as_ref(), 0)
-        } else {
-            let x = u64::from(self.results.as_ref()[len-1]);
-            self.generate_and_set(1);
-            let y = u64::from(self.results.as_ref()[0]);
-            (y << 32) | x
-        }
-    }
-
-    // As an optimization we try to write directly into the output buffer.
-    // This is only enabled for little-endian platforms where unaligned writes
-    // are known to be safe and fast.
-    #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
-    fn fill_bytes(&mut self, dest: &mut [u8]) {
-        let mut filled = 0;
-
-        // Continue filling from the current set of results
-        if self.index < self.results.as_ref().len() {
-            let (consumed_u32, filled_u8) =
-                fill_via_u32_chunks(&self.results.as_ref()[self.index..],
-                                    dest);
-
-            self.index += consumed_u32;
-            filled += filled_u8;
-        }
-
-        let len_remainder =
-            (dest.len() - filled) % (self.results.as_ref().len() * 4);
-        let end_direct = dest.len() - len_remainder;
-
-        while filled < end_direct {
-            let dest_u32: &mut R::Results = unsafe {
-                &mut *(dest[filled..].as_mut_ptr() as
-                *mut <R as BlockRngCore>::Results)
-            };
-            self.core.generate(dest_u32);
-            filled += self.results.as_ref().len() * 4;
-            self.index = self.results.as_ref().len();
-        }
-
-        if len_remainder > 0 {
-            self.core.generate(&mut self.results);
-            let (consumed_u32, _) =
-                fill_via_u32_chunks(self.results.as_ref(),
-                                    &mut dest[filled..]);
-
-            self.index = consumed_u32;
-        }
-    }
-
-    #[cfg(not(any(target_arch = "x86", target_arch = "x86_64")))]
-    fn fill_bytes(&mut self, dest: &mut [u8]) {
-        let mut read_len = 0;
-        while read_len < dest.len() {
-            if self.index >= self.results.as_ref().len() {
-                self.generate_and_set(0);
-            }
-            let (consumed_u32, filled_u8) =
-                fill_via_u32_chunks(&self.results.as_ref()[self.index..],
-                                    &mut dest[read_len..]);
-
-            self.index += consumed_u32;
-            read_len += filled_u8;
-        }
-    }
-
-    fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error> {
-        self.fill_bytes(dest);
-        Ok(())
-    }
-}
-
-impl<R: BlockRngCore + SeedableRng> SeedableRng for BlockRng<R> {
-    type Seed = R::Seed;
-
-    fn from_seed(seed: Self::Seed) -> Self {
-        Self::new(R::from_seed(seed))
-    }
-
-    fn seed_from_u64(seed: u64) -> Self {
-        Self::new(R::seed_from_u64(seed))
-    }
-
-    fn from_rng<S: RngCore>(rng: S) -> Result<Self, Error> {
-        Ok(Self::new(R::from_rng(rng)?))
-    }
-}
-
-
-
-/// A wrapper type implementing [`RngCore`] for some type implementing
-/// [`BlockRngCore`] with `u64` array buffer; i.e. this can be used to implement
-/// a full RNG from just a `generate` function.
-///
-/// This is similar to [`BlockRng`], but specialized for algorithms that operate
-/// on `u64` values.
-///
-/// No whole generated `u64` values are thrown away and all values are consumed
-/// in-order. [`next_u64`] simply takes the next available `u64` value.
-/// [`next_u32`] is however a bit special: half of a `u64` is consumed, leaving
-/// the other half in the buffer. If the next function called is [`next_u32`]
-/// then the other half is then consumed, however both [`next_u64`] and
-/// [`fill_bytes`] discard the rest of any half-consumed `u64`s when called.
-///
-/// [`fill_bytes`] and [`try_fill_bytes`] consume a whole number of `u64`
-/// values. If the requested length is not a multiple of 8, some bytes will be
-/// discarded.
-///
-/// [`next_u32`]: RngCore::next_u32
-/// [`next_u64`]: RngCore::next_u64
-/// [`fill_bytes`]: RngCore::fill_bytes
-/// [`try_fill_bytes`]: RngCore::try_fill_bytes
-#[derive(Clone)]
-#[cfg_attr(feature="serde1", derive(Serialize, Deserialize))]
-pub struct BlockRng64<R: BlockRngCore + ?Sized> {
-    results: R::Results,
-    index: usize,
-    half_used: bool, // true if only half of the previous result is used
-    /// The *core* part of the RNG, implementing the `generate` function.
-    pub core: R,
-}
-
-// Custom Debug implementation that does not expose the contents of `results`.
-impl<R: BlockRngCore + fmt::Debug> fmt::Debug for BlockRng64<R> {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        fmt.debug_struct("BlockRng64")
-           .field("core", &self.core)
-           .field("result_len", &self.results.as_ref().len())
-           .field("index", &self.index)
-           .field("half_used", &self.half_used)
-           .finish()
-    }
-}
-
-impl<R: BlockRngCore> BlockRng64<R> {
-    /// Create a new `BlockRng` from an existing RNG implementing
-    /// `BlockRngCore`. Results will be generated on first use.
-    pub fn new(core: R) -> BlockRng64<R>{
-        let results_empty = R::Results::default();
-        BlockRng64 {
-            core,
-            index: results_empty.as_ref().len(),
-            half_used: false,
-            results: results_empty,
-        }
-    }
-
-    /// Get the index into the result buffer.
-    ///
-    /// If this is equal to or larger than the size of the result buffer then
-    /// the buffer is "empty" and `generate()` must be called to produce new
-    /// results.
-    pub fn index(&self) -> usize {
-        self.index
-    }
-
-    /// Reset the number of available results.
-    /// This will force a new set of results to be generated on next use.
-    pub fn reset(&mut self) {
-        self.index = self.results.as_ref().len();
-        self.half_used = false;
-    }
-
-    /// Generate a new set of results immediately, setting the index to the
-    /// given value.
-    pub fn generate_and_set(&mut self, index: usize) {
-        assert!(index < self.results.as_ref().len());
-        self.core.generate(&mut self.results);
-        self.index = index;
-        self.half_used = false;
-    }
-}
-
-impl<R: BlockRngCore<Item=u64>> RngCore for BlockRng64<R>
-where <R as BlockRngCore>::Results: AsRef<[u64]> + AsMut<[u64]>
-{
-    #[inline(always)]
-    fn next_u32(&mut self) -> u32 {
-        let mut index = self.index * 2 - self.half_used as usize;
-        if index >= self.results.as_ref().len() * 2 {
-            self.core.generate(&mut self.results);
-            self.index = 0;
-            // `self.half_used` is by definition `false`
-            self.half_used = false;
-            index = 0;
-        }
-
-        self.half_used = !self.half_used;
-        self.index += self.half_used as usize;
-
-        // Index as if this is a u32 slice.
-        unsafe {
-            let results =
-                &*(self.results.as_ref() as *const [u64] as *const [u32]);
-            if cfg!(target_endian = "little") {
-                *results.get_unchecked(index)
-            } else {
-                *results.get_unchecked(index ^ 1)
-            }
-        }
-    }
-
-    #[inline(always)]
-    fn next_u64(&mut self) -> u64 {
-        if self.index >= self.results.as_ref().len() {
-            self.core.generate(&mut self.results);
-            self.index = 0;
-        }
-
-        let value = self.results.as_ref()[self.index];
-        self.index += 1;
-        self.half_used = false;
-        value
-    }
-
-    // As an optimization we try to write directly into the output buffer.
-    // This is only enabled for little-endian platforms where unaligned writes
-    // are known to be safe and fast.
-    #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
-    fn fill_bytes(&mut self, dest: &mut [u8]) {
-        let mut filled = 0;
-        self.half_used = false;
-
-        // Continue filling from the current set of results
-        if self.index < self.results.as_ref().len() {
-            let (consumed_u64, filled_u8) =
-                fill_via_u64_chunks(&self.results.as_ref()[self.index..],
-                                    dest);
-
-            self.index += consumed_u64;
-            filled += filled_u8;
-        }
-
-        let len_remainder =
-            (dest.len() - filled) % (self.results.as_ref().len() * 8);
-        let end_direct = dest.len() - len_remainder;
-
-        while filled < end_direct {
-            let dest_u64: &mut R::Results = unsafe {
-                ::core::mem::transmute(dest[filled..].as_mut_ptr())
-            };
-            self.core.generate(dest_u64);
-            filled += self.results.as_ref().len() * 8;
-            self.index = self.results.as_ref().len();
-        }
-
-        if len_remainder > 0 {
-            self.core.generate(&mut self.results);
-            let (consumed_u64, _) =
-                fill_via_u64_chunks(&mut self.results.as_ref(),
-                                    &mut dest[filled..]);
-
-            self.index = consumed_u64;
-        }
-    }
-
-    #[cfg(not(any(target_arch = "x86", target_arch = "x86_64")))]
-    fn fill_bytes(&mut self, dest: &mut [u8]) {
-        let mut read_len = 0;
-        self.half_used = false;
-        while read_len < dest.len() {
-            if self.index as usize >= self.results.as_ref().len() {
-                self.core.generate(&mut self.results);
-                self.index = 0;
-            }
-
-            let (consumed_u64, filled_u8) =
-                fill_via_u64_chunks(&self.results.as_ref()[self.index as usize..],
-                                    &mut dest[read_len..]);
-
-            self.index += consumed_u64;
-            read_len += filled_u8;
-        }
-    }
-
-    fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error> {
-        Ok(self.fill_bytes(dest))
-    }
-}
-
-impl<R: BlockRngCore + SeedableRng> SeedableRng for BlockRng64<R> {
-    type Seed = R::Seed;
-
-    fn from_seed(seed: Self::Seed) -> Self {
-        Self::new(R::from_seed(seed))
-    }
-
-    fn seed_from_u64(seed: u64) -> Self {
-        Self::new(R::seed_from_u64(seed))
-    }
-
-    fn from_rng<S: RngCore>(rng: S) -> Result<Self, Error> {
-        Ok(Self::new(R::from_rng(rng)?))
-    }
-}
-
-impl<R: BlockRngCore + CryptoRng> CryptoRng for BlockRng<R> {}
diff --git a/vendor/rand_core-0.3.1/src/error.rs b/vendor/rand_core-0.3.1/src/error.rs
deleted file mode 100644
index 5a8459e..0000000
--- a/vendor/rand_core-0.3.1/src/error.rs
+++ /dev/null
@@ -1,177 +0,0 @@
-// Copyright 2018 Developers of the Rand project.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! Error types
-
-use core::fmt;
-
-#[cfg(feature="std")]
-use std::error::Error as stdError;
-#[cfg(feature="std")]
-use std::io;
-
-/// Error kind which can be matched over.
-#[derive(PartialEq, Eq, Debug, Copy, Clone)]
-pub enum ErrorKind {
-    /// Feature is not available; not recoverable.
-    /// 
-    /// This is the most permanent failure type and implies the error cannot be
-    /// resolved simply by retrying (e.g. the feature may not exist in this
-    /// build of the application or on the current platform).
-    Unavailable,
-    /// General failure; there may be a chance of recovery on retry.
-    /// 
-    /// This is the catch-all kind for errors from known and unknown sources
-    /// which do not have a more specific kind / handling method.
-    /// 
-    /// It is suggested to retry a couple of times or retry later when
-    /// handling; some error sources may be able to resolve themselves,
-    /// although this is not likely.
-    Unexpected,
-    /// A transient failure which likely can be resolved or worked around.
-    /// 
-    /// This error kind exists for a few specific cases where it is known that
-    /// the error likely can be resolved internally, but is reported anyway.
-    Transient,
-    /// Not ready yet: recommended to try again a little later.
-    /// 
-    /// This error kind implies the generator needs more time or needs some
-    /// other part of the application to do something else first before it is
-    /// ready for use; for example this may be used by external generators
-    /// which require time for initialization.
-    NotReady,
-    #[doc(hidden)]
-    __Nonexhaustive,
-}
-
-impl ErrorKind {
-    /// True if this kind of error may resolve itself on retry.
-    /// 
-    /// See also `should_wait()`.
-    pub fn should_retry(self) -> bool {
-        self != ErrorKind::Unavailable
-    }
-    
-    /// True if we should retry but wait before retrying
-    /// 
-    /// This implies `should_retry()` is true.
-    pub fn should_wait(self) -> bool {
-        self == ErrorKind::NotReady
-    }
-    
-    /// A description of this error kind
-    pub fn description(self) -> &'static str {
-        match self {
-            ErrorKind::Unavailable => "permanently unavailable",
-            ErrorKind::Unexpected => "unexpected failure",
-            ErrorKind::Transient => "transient failure",
-            ErrorKind::NotReady => "not ready yet",
-            ErrorKind::__Nonexhaustive => unreachable!(),
-        }
-    }
-}
-
-
-/// Error type of random number generators
-/// 
-/// This is a relatively simple error type, designed for compatibility with and
-/// without the Rust `std` library. It embeds a "kind" code, a message (static
-/// string only), and an optional chained cause (`std` only). The `kind` and
-/// `msg` fields can be accessed directly; cause can be accessed via
-/// `std::error::Error::cause` or `Error::take_cause`. Construction can only be
-/// done via `Error::new` or `Error::with_cause`.
-#[derive(Debug)]
-pub struct Error {
-    /// The error kind
-    pub kind: ErrorKind,
-    /// The error message
-    pub msg: &'static str,
-    #[cfg(feature="std")]
-    cause: Option<Box<stdError + Send + Sync>>,
-}
-
-impl Error {
-    /// Create a new instance, with specified kind and a message.
-    pub fn new(kind: ErrorKind, msg: &'static str) -> Self {
-        #[cfg(feature="std")] {
-            Error { kind, msg, cause: None }
-        }
-        #[cfg(not(feature="std"))] {
-            Error { kind, msg }
-        }
-    }
-    
-    /// Create a new instance, with specified kind, message, and a
-    /// chained cause.
-    /// 
-    /// Note: `stdError` is an alias for `std::error::Error`.
-    /// 
-    /// If not targetting `std` (i.e. `no_std`), this function is replaced by
-    /// another with the same prototype, except that there are no bounds on the
-    /// type `E` (because both `Box` and `stdError` are unavailable), and the
-    /// `cause` is ignored.
-    #[cfg(feature="std")]
-    pub fn with_cause<E>(kind: ErrorKind, msg: &'static str, cause: E) -> Self
-        where E: Into<Box<stdError + Send + Sync>>
-    {
-        Error { kind, msg, cause: Some(cause.into()) }
-    }
-    
-    /// Create a new instance, with specified kind, message, and a
-    /// chained cause.
-    /// 
-    /// In `no_std` mode the *cause* is ignored.
-    #[cfg(not(feature="std"))]
-    pub fn with_cause<E>(kind: ErrorKind, msg: &'static str, _cause: E) -> Self {
-        Error { kind, msg }
-    }
-    
-    /// Take the cause, if any. This allows the embedded cause to be extracted.
-    /// This uses `Option::take`, leaving `self` with no cause.
-    #[cfg(feature="std")]
-    pub fn take_cause(&mut self) -> Option<Box<stdError + Send + Sync>> {
-        self.cause.take()
-    }
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        #[cfg(feature="std")] {
-            if let Some(ref cause) = self.cause {
-                return write!(f, "{} ({}); cause: {}",
-                        self.msg, self.kind.description(), cause);
-            }
-        }
-        write!(f, "{} ({})", self.msg, self.kind.description())
-    }
-}
-
-#[cfg(feature="std")]
-impl stdError for Error {
-    fn description(&self) -> &str {
-        self.msg
-    }
-
-    fn cause(&self) -> Option<&stdError> {
-        self.cause.as_ref().map(|e| e.as_ref() as &stdError)
-    }
-}
-
-#[cfg(feature="std")]
-impl From<Error> for io::Error {
-    fn from(error: Error) -> Self {
-        use std::io::ErrorKind::*;
-        match error.kind {
-            ErrorKind::Unavailable => io::Error::new(NotFound, error),
-            ErrorKind::Unexpected |
-            ErrorKind::Transient => io::Error::new(Other, error),
-            ErrorKind::NotReady => io::Error::new(WouldBlock, error),
-            ErrorKind::__Nonexhaustive => unreachable!(),
-        }
-    }
-}
diff --git a/vendor/rand_core-0.3.1/src/impls.rs b/vendor/rand_core-0.3.1/src/impls.rs
deleted file mode 100644
index 57bdd07..0000000
--- a/vendor/rand_core-0.3.1/src/impls.rs
+++ /dev/null
@@ -1,165 +0,0 @@
-// Copyright 2018 Developers of the Rand project.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! Helper functions for implementing `RngCore` functions.
-//!
-//! For cross-platform reproducibility, these functions all use Little Endian:
-//! least-significant part first. For example, `next_u64_via_u32` takes `u32`
-//! values `x, y`, then outputs `(y << 32) | x`. To implement `next_u32`
-//! from `next_u64` in little-endian order, one should use `next_u64() as u32`.
-//!
-//! Byte-swapping (like the std `to_le` functions) is only needed to convert
-//! to/from byte sequences, and since its purpose is reproducibility,
-//! non-reproducible sources (e.g. `OsRng`) need not bother with it.
-
-use core::intrinsics::transmute;
-use core::ptr::copy_nonoverlapping;
-use core::slice;
-use core::cmp::min;
-use core::mem::size_of;
-use RngCore;
-
-
-/// Implement `next_u64` via `next_u32`, little-endian order.
-pub fn next_u64_via_u32<R: RngCore + ?Sized>(rng: &mut R) -> u64 {
-    // Use LE; we explicitly generate one value before the next.
-    let x = u64::from(rng.next_u32());
-    let y = u64::from(rng.next_u32());
-    (y << 32) | x
-}
-
-/// Implement `fill_bytes` via `next_u64` and `next_u32`, little-endian order.
-///
-/// The fastest way to fill a slice is usually to work as long as possible with
-/// integers. That is why this method mostly uses `next_u64`, and only when
-/// there are 4 or less bytes remaining at the end of the slice it uses
-/// `next_u32` once.
-pub fn fill_bytes_via_next<R: RngCore + ?Sized>(rng: &mut R, dest: &mut [u8]) {
-    let mut left = dest;
-    while left.len() >= 8 {
-        let (l, r) = {left}.split_at_mut(8);
-        left = r;
-        let chunk: [u8; 8] = unsafe {
-            transmute(rng.next_u64().to_le())
-        };
-        l.copy_from_slice(&chunk);
-    }
-    let n = left.len();
-    if n > 4 {
-        let chunk: [u8; 8] = unsafe {
-            transmute(rng.next_u64().to_le())
-        };
-        left.copy_from_slice(&chunk[..n]);
-    } else if n > 0 {
-        let chunk: [u8; 4] = unsafe {
-            transmute(rng.next_u32().to_le())
-        };
-        left.copy_from_slice(&chunk[..n]);
-    }
-}
-
-macro_rules! impl_uint_from_fill {
-    ($rng:expr, $ty:ty, $N:expr) => ({
-        debug_assert!($N == size_of::<$ty>());
-
-        let mut int: $ty = 0;
-        unsafe {
-            let ptr = &mut int as *mut $ty as *mut u8;
-            let slice = slice::from_raw_parts_mut(ptr, $N);
-            $rng.fill_bytes(slice);
-        }
-        int
-    });
-}
-
-macro_rules! fill_via_chunks {
-    ($src:expr, $dst:expr, $ty:ty, $size:expr) => ({
-        let chunk_size_u8 = min($src.len() * $size, $dst.len());
-        let chunk_size = (chunk_size_u8 + $size - 1) / $size;
-        if cfg!(target_endian="little") {
-            unsafe {
-                copy_nonoverlapping(
-                    $src.as_ptr() as *const u8,
-                    $dst.as_mut_ptr(),
-                    chunk_size_u8);
-            }
-        } else {
-            for (&n, chunk) in $src.iter().zip($dst.chunks_mut($size)) {
-                let tmp = n.to_le();
-                let src_ptr = &tmp as *const $ty as *const u8;
-                unsafe {
-                    copy_nonoverlapping(src_ptr,
-                                        chunk.as_mut_ptr(),
-                                        chunk.len());
-                }
-            }
-        }
-
-        (chunk_size, chunk_size_u8)
-    });
-}
-
-/// Implement `fill_bytes` by reading chunks from the output buffer of a block
-/// based RNG.
-///
-/// The return values are `(consumed_u32, filled_u8)`.
-///
-/// `filled_u8` is the number of filled bytes in `dest`, which may be less than
-/// the length of `dest`.
-/// `consumed_u32` is the number of words consumed from `src`, which is the same
-/// as `filled_u8 / 4` rounded up.
-///
-/// # Example
-/// (from `IsaacRng`)
-///
-/// ```ignore
-/// fn fill_bytes(&mut self, dest: &mut [u8]) {
-///     let mut read_len = 0;
-///     while read_len < dest.len() {
-///         if self.index >= self.rsl.len() {
-///             self.isaac();
-///         }
-///
-///         let (consumed_u32, filled_u8) =
-///             impls::fill_via_u32_chunks(&mut self.rsl[self.index..],
-///                                        &mut dest[read_len..]);
-///
-///         self.index += consumed_u32;
-///         read_len += filled_u8;
-///     }
-/// }
-/// ```
-pub fn fill_via_u32_chunks(src: &[u32], dest: &mut [u8]) -> (usize, usize) {
-    fill_via_chunks!(src, dest, u32, 4)
-}
-
-/// Implement `fill_bytes` by reading chunks from the output buffer of a block
-/// based RNG.
-///
-/// The return values are `(consumed_u64, filled_u8)`.
-/// `filled_u8` is the number of filled bytes in `dest`, which may be less than
-/// the length of `dest`.
-/// `consumed_u64` is the number of words consumed from `src`, which is the same
-/// as `filled_u8 / 8` rounded up.
-///
-/// See `fill_via_u32_chunks` for an example.
-pub fn fill_via_u64_chunks(src: &[u64], dest: &mut [u8]) -> (usize, usize) {
-    fill_via_chunks!(src, dest, u64, 8)
-}
-
-/// Implement `next_u32` via `fill_bytes`, little-endian order.
-pub fn next_u32_via_fill<R: RngCore + ?Sized>(rng: &mut R) -> u32 {
-    impl_uint_from_fill!(rng, u32, 4)
-}
-
-/// Implement `next_u64` via `fill_bytes`, little-endian order.
-pub fn next_u64_via_fill<R: RngCore + ?Sized>(rng: &mut R) -> u64 {
-    impl_uint_from_fill!(rng, u64, 8)
-}
-
-// TODO: implement tests for the above
diff --git a/vendor/rand_core-0.3.1/src/le.rs b/vendor/rand_core-0.3.1/src/le.rs
deleted file mode 100644
index 266651f..0000000
--- a/vendor/rand_core-0.3.1/src/le.rs
+++ /dev/null
@@ -1,68 +0,0 @@
-// Copyright 2018 Developers of the Rand project.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! Little-Endian utilities
-//! 
-//! Little-Endian order has been chosen for internal usage; this makes some
-//! useful functions available.
-
-use core::ptr;
-
-macro_rules! read_slice {
-    ($src:expr, $dst:expr, $size:expr, $which:ident) => {{
-        assert_eq!($src.len(), $size * $dst.len());
-
-        unsafe {
-            ptr::copy_nonoverlapping(
-                $src.as_ptr(),
-                $dst.as_mut_ptr() as *mut u8,
-                $src.len());
-        }
-        for v in $dst.iter_mut() {
-            *v = v.$which();
-        }
-    }};
-}
-
-/// Reads unsigned 32 bit integers from `src` into `dst`.
-/// Borrowed from the `byteorder` crate.
-#[inline]
-pub fn read_u32_into(src: &[u8], dst: &mut [u32]) {
-    read_slice!(src, dst, 4, to_le);
-}
-
-/// Reads unsigned 64 bit integers from `src` into `dst`.
-/// Borrowed from the `byteorder` crate.
-#[inline]
-pub fn read_u64_into(src: &[u8], dst: &mut [u64]) {
-    read_slice!(src, dst, 8, to_le);
-}
-
-#[test]
-fn test_read() {
-    let bytes = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
-    
-    let mut buf = [0u32; 4];
-    read_u32_into(&bytes, &mut buf);
-    assert_eq!(buf[0], 0x04030201);
-    assert_eq!(buf[3], 0x100F0E0D);
-    
-    let mut buf = [0u32; 3];
-    read_u32_into(&bytes[1..13], &mut buf);  // unaligned
-    assert_eq!(buf[0], 0x05040302);
-    assert_eq!(buf[2], 0x0D0C0B0A);
-    
-    let mut buf = [0u64; 2];
-    read_u64_into(&bytes, &mut buf);
-    assert_eq!(buf[0], 0x0807060504030201);
-    assert_eq!(buf[1], 0x100F0E0D0C0B0A09);
-    
-    let mut buf = [0u64; 1];
-    read_u64_into(&bytes[7..15], &mut buf); // unaligned
-    assert_eq!(buf[0], 0x0F0E0D0C0B0A0908);
-}
diff --git a/vendor/rand_core-0.3.1/src/lib.rs b/vendor/rand_core-0.3.1/src/lib.rs
deleted file mode 100644
index 8923142..0000000
--- a/vendor/rand_core-0.3.1/src/lib.rs
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2018 Developers of the Rand project.
-// Copyright 2017-2018 The Rust Project Developers.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-//! Random number generation traits
-//!
-//! This version of `rand_core` is a compatibility shim around version 0.3.
-//!
-//! This crate is mainly of interest to crates publishing implementations of
-//! [`RngCore`]. Other users are encouraged to use the [`rand`] crate instead
-//! which re-exports the main traits and error types.
-//!
-//! [`RngCore`] is the core trait implemented by algorithmic pseudo-random number
-//! generators and external random-number sources.
-//!
-//! [`SeedableRng`] is an extension trait for construction from fixed seeds and
-//! other random number generators.
-//!
-//! [`Error`] is provided for error-handling. It is safe to use in `no_std`
-//! environments.
-//!
-//! The [`impls`] and [`le`] sub-modules include a few small functions to assist
-//! implementation of [`RngCore`].
-//!
-//! [`rand`]: https://docs.rs/rand
-
-#![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk.png",
-       html_favicon_url = "https://www.rust-lang.org/favicon.ico",
-       html_root_url = "https://rust-random.github.io/rand/")]
-
-#![deny(missing_docs)]
-#![deny(missing_debug_implementations)]
-#![doc(test(attr(allow(unused_variables), deny(warnings))))]
-
-#![no_std]
-
-extern crate rand_core as core4;
-
-pub use core4::{ErrorKind, Error};
-pub use core4::{block, impls, le};
-pub use core4::{RngCore, CryptoRng, SeedableRng};