Removed outdated comment.

Summary: Got outdated in D3143931.

Reviewed By: yfeldblum

Differential Revision: D13494612

fbshipit-source-id: e24bfea36896ec04b15fa443348e00f50f75940d

folly/io/async/EventBase.h

@@ -671,8 +671,6 @@ class EventBase : private boost::noncopyable,
 
   /// Implements the Executor interface
   void add(Cob fn) override {
-    // runInEventBaseThread() takes a const&,
-    // so no point in doing std::move here.
     runInEventBaseThread(std::move(fn));
   }