address review feedback: remove dupe feature opt-in.

pnkfelix · pnkfelix · commit 1905a498751a · 2015-07-22T23:25:52.000+02:00
diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs
@@ -85,7 +85,6 @@
 #![feature(placement_in_syntax)]
 #![feature(raw)]
 #![feature(staged_api)]
-#![feature(placement_in_syntax)]
 #![feature(unboxed_closures)]
 #![feature(unique)]
 #![feature(unsafe_no_drop_flag, filling_drop)]
