deprecate BitSet and BitVec

Author: Gankra

src/libstd/collections/mod.rs

@@ -383,11 +383,19 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
+#[deprecated(reason = "moved to cargo as `bit-vec`", since = "1.2.0")]
+#[unstable(feature = "collections", reason = "deprecated")]
+pub use core_collections::{BitVec, bit_vec};
+
+#[deprecated(reason = "moved to cargo as `bit-set`", since = "1.2.0")]
+#[unstable(feature = "collections", reason = "deprecated")]
+pub use core_collections::{BitSet, bit_set};
+
 pub use core_collections::Bound;
-pub use core_collections::{BinaryHeap, BitVec, BitSet, BTreeMap, BTreeSet};
+pub use core_collections::{BinaryHeap, BTreeMap, BTreeSet};
 pub use core_collections::{LinkedList, VecDeque, VecMap};
 
-pub use core_collections::{binary_heap, bit_vec, bit_set, btree_map, btree_set};
+pub use core_collections::{binary_heap, btree_map, btree_set};
 pub use core_collections::{linked_list, vec_deque, vec_map};
 
 pub use self::hash_map::HashMap;