Register new snapshots

* Lots of core prelude imports removed
* Makefile support for MSVC env vars and Rust crates removed
* Makefile support for morestack removed

src/libstd/sync/mpsc/mod.rs

@@ -265,9 +265,6 @@
 // And now that you've seen all the races that I found and attempted to fix,
 // here's the code for you to find some more!
 
-#[cfg(stage0)]
-use prelude::v1::*;
-
 use sync::Arc;
 use error;
 use fmt;

src/libstd/sync/mpsc/mpsc_queue.rs

@@ -40,9 +40,6 @@
 
 pub use self::PopResult::*;
 
-#[cfg(stage0)]
-use core::prelude::v1::*;
-
 use alloc::boxed::Box;
 use core::ptr;
 use core::cell::UnsafeCell;

src/libstd/sync/mpsc/oneshot.rs

@@ -37,9 +37,6 @@ pub use self::UpgradeResult::*;
 pub use self::SelectionResult::*;
 use self::MyUpgrade::*;
 
-#[cfg(stage0)]
-use core::prelude::v1::*;
-
 use sync::mpsc::Receiver;
 use sync::mpsc::blocking::{self, SignalToken};
 use core::mem;

src/libstd/sync/mpsc/select.rs

@@ -57,9 +57,6 @@
                       but no guarantees beyond this are being made")]
 
 
-#[cfg(stage0)]
-use core::prelude::v1::*;
-
 use core::cell::{Cell, UnsafeCell};
 use core::marker;
 use core::ptr;

src/libstd/sync/mpsc/shared.rs

@@ -20,9 +20,6 @@
 
 pub use self::Failure::*;
 
-#[cfg(stage0)]
-use core::prelude::v1::*;
-
 use core::cmp;
 use core::isize;
 

src/libstd/sync/mpsc/spsc_queue.rs

@@ -33,9 +33,6 @@
 //! concurrently between two threads. This data structure is safe to use and
 //! enforces the semantics that there is one pusher and one popper.
 
-#[cfg(stage0)]
-use core::prelude::v1::*;
-
 use alloc::boxed::Box;
 use core::ptr;
 use core::cell::UnsafeCell;

src/libstd/sync/mpsc/stream.rs

@@ -22,9 +22,6 @@ pub use self::UpgradeResult::*;
 pub use self::SelectionResult::*;
 use self::Message::*;
 
-#[cfg(stage0)]
-use core::prelude::v1::*;
-
 use core::cmp;
 use core::isize;
 use thread;

src/libstd/sync/mpsc/sync.rs

@@ -33,9 +33,6 @@
 /// of a synchronous channel. There are a few branches for the unbuffered case,
 /// but they're mostly just relevant to blocking senders.
 
-#[cfg(stage0)]
-use core::prelude::v1::*;
-
 pub use self::Failure::*;
 use self::Blocker::*;