events: remove misleading comment

lib/events.js

@@ -94,8 +94,6 @@ EventEmitter.prototype.emit = function() {
   }
 };
 
-// EventEmitter is defined in src/node_events.cc
-// EventEmitter.prototype.emit() is also defined there.
 EventEmitter.prototype.addListener = function(type, listener) {
   if ('function' !== typeof listener) {
     throw new Error('addListener only takes instances of Function');