Remove some '#[feature]' attributes for stabilized features

Author: SimonSapin

src/doc/unstable-book/src/library-features/alloc-system.md

@@ -61,7 +61,6 @@ crate.io’s `jemallocator` crate provides equivalent functionality.)
 jemallocator = "0.1"
 ```
 ```rust,ignore
-#![feature(global_allocator)]
 #![crate_type = "dylib"]
 
 extern crate jemallocator;

src/liballoc_system/lib.rs

@@ -14,7 +14,6 @@
             reason = "this library is unlikely to be stabilized in its current \
                       form or name",
             issue = "32838")]
-#![feature(global_allocator)]
 #![feature(allocator_api)]
 #![feature(core_intrinsics)]
 #![feature(staged_api)]

src/librustc_asan/lib.rs

@@ -10,8 +10,7 @@
 
 #![sanitizer_runtime]
 #![feature(alloc_system)]
-#![feature(allocator_api)]
-#![feature(global_allocator)]
+#![cfg_attr(stage0, feature(global_allocator))]
 #![feature(sanitizer_runtime)]
 #![feature(staged_api)]
 #![no_std]

src/librustc_lsan/lib.rs

@@ -9,10 +9,9 @@
 // except according to those terms.
 
 #![sanitizer_runtime]
-#![feature(sanitizer_runtime)]
 #![feature(alloc_system)]
-#![feature(allocator_api)]
-#![feature(global_allocator)]
+#![cfg_attr(stage0, feature(global_allocator))]
+#![feature(sanitizer_runtime)]
 #![feature(staged_api)]
 #![no_std]
 #![unstable(feature = "sanitizer_runtime_lib",

src/librustc_msan/lib.rs

@@ -9,10 +9,9 @@
 // except according to those terms.
 
 #![sanitizer_runtime]
-#![feature(sanitizer_runtime)]
 #![feature(alloc_system)]
-#![feature(allocator_api)]
-#![feature(global_allocator)]
+#![cfg_attr(stage0, feature(global_allocator))]
+#![feature(sanitizer_runtime)]
 #![feature(staged_api)]
 #![no_std]
 #![unstable(feature = "sanitizer_runtime_lib",

src/librustc_tsan/lib.rs

@@ -10,8 +10,7 @@
 
 #![sanitizer_runtime]
 #![feature(alloc_system)]
-#![feature(allocator_api)]
-#![feature(global_allocator)]
+#![cfg_attr(stage0, feature(global_allocator))]
 #![feature(sanitizer_runtime)]
 #![feature(staged_api)]
 #![no_std]

src/libstd/lib.rs

@@ -263,7 +263,6 @@
 #![feature(fnbox)]
 #![feature(futures_api)]
 #![feature(hashmap_internals)]
-#![feature(heap_api)]
 #![feature(int_error_internals)]
 #![feature(integer_atomics)]
 #![feature(into_cow)]

src/test/compile-fail/allocator/auxiliary/system-allocator.rs

@@ -10,7 +10,6 @@
 
 // no-prefer-dynamic
 
-#![feature(global_allocator, allocator_api)]
 #![crate_type = "rlib"]
 
 use std::alloc::System;

src/test/compile-fail/allocator/auxiliary/system-allocator2.rs

@@ -10,7 +10,6 @@
 
 // no-prefer-dynamic
 
-#![feature(global_allocator, allocator_api)]
 #![crate_type = "rlib"]
 
 use std::alloc::System;

src/test/compile-fail/allocator/function-allocator.rs

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(global_allocator)]
 
 #[global_allocator]
 fn foo() {} //~ ERROR: allocators must be statics