Deprecation fallout in libsync

src/libsync/atomic.rs

@@ -101,6 +101,8 @@
 //! }
 //! ```
 
+#![allow(deprecated)]
+
 use core::prelude::*;
 
 use alloc::boxed::Box;

src/libsync/comm/duplex.rs

@@ -15,6 +15,7 @@
 */
 
 #![allow(missing_doc)]
+#![allow(deprecated)]
 #![deprecated = "This type is replaced by having a pair of channels. This type \
                  is not fully composable with other channels in terms of \
                  or possible semantics on a duplex stream. It will be removed \