auto merge of #15556 : alexcrichton/rust/snapshots, r=brson

Closes #15544

src/libcore/lib.rs

@@ -47,7 +47,6 @@
 // Since libcore defines many fundamental lang items, all tests live in a
 // separate crate, libcoretest, to avoid bizarre issues.
 
-#![crate_id = "core#0.11.0"]
 #![crate_name = "core"]
 #![experimental]
 #![license = "MIT/ASL2"]
@@ -61,7 +60,6 @@
 #![feature(globs, intrinsics, lang_items, macro_rules, managed_boxes, phase)]
 #![feature(simd, unsafe_destructor)]
 #![deny(missing_doc)]
-#![allow(unused_attribute)] // NOTE: remove after stage0
 
 mod macros;