Remove now useless allow(unused_lifetimes) from clippy

Author: oli-obk

clippy_lints/src/lib.rs

@@ -11,7 +11,6 @@
 #![feature(conservative_impl_trait)]
 
 #![allow(indexing_slicing, shadow_reuse, unknown_lints, missing_docs_in_private_items)]
-#![allow(needless_lifetimes)]
 
 extern crate syntax;
 extern crate syntax_pos;