Remove unused feature

tbu- · tbu- · commit 33af24ca4c2a · 2015-08-09T23:53:28.000+02:00
diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
@@ -27,7 +27,6 @@
 
 #![feature(associated_consts)]
 #![feature(bitset)]
-#![feature(copy_lifetime)]
 #![feature(drain)]
 #![feature(filling_drop)]
 #![feature(libc)]
