rm trace macros again

tarpc/src/lib.rs

@@ -42,7 +42,7 @@
 //! ```
 
 #![deny(missing_docs)]
-#![feature(custom_derive, plugin, trace_macros)]
+#![feature(custom_derive, plugin)]
 #![plugin(serde_macros)]
 
 extern crate serde;

tarpc/src/macros.rs

@@ -1,5 +1,3 @@
-trace_macros!(true);
-
 #[doc(hidden)]
 #[macro_export]
 macro_rules! as_item { ($i:item) => {$i} }