std: Delete the `alloc_system` crate

This commit deletes the `alloc_system` crate from the standard
distribution. This unstable crate is no longer needed in the modern
stable global allocator world, but rather its functionality is folded
directly into the standard library. The standard library was already the
only stable location to access this crate, and as a result this should
not affect any stable code.

2 files changed, 1 insertions, 4 deletions

diff --git a/src/liballoc/tests/heap.rs b/src/liballoc/tests/heap.rs
index b6be38107da..bf256b23f9a 100644
--- a/src/liballoc/tests/heap.rs
+++ b/src/liballoc/tests/heap.rs
@@ -8,8 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use alloc_system::System;
-use std::alloc::{Global, Alloc, Layout};
+use std::alloc::{Global, Alloc, Layout, System};
 
 /// https://github.com/rust-lang/rust/issues/45955
 #[test]
diff --git a/src/liballoc/tests/lib.rs b/src/liballoc/tests/lib.rs
index 3294837cb91..e514a8a69c0 100644
--- a/src/liballoc/tests/lib.rs
+++ b/src/liballoc/tests/lib.rs
@@ -9,7 +9,6 @@
 // except according to those terms.
 
 #![feature(allocator_api)]
-#![feature(alloc_system)]
 #![feature(box_syntax)]
 #![feature(drain_filter)]
 #![feature(exact_size_is_empty)]
@@ -20,7 +19,6 @@
 #![feature(unboxed_closures)]
 #![feature(repeat_generic_slice)]
 
-extern crate alloc_system;
 extern crate core;
 extern crate rand;