Remove "YG_ENABLE_EVENTS" Preprocessor Definition

Summary:
This is always enabled internally, so we should just turn it on everywhere.

Changelog: [Internal]

Reviewed By: cortinico

Differential Revision: D42406509

fbshipit-source-id: c9cdd4fcf907d66cd276e0aec608a2e7db7ca5fb

ReactCommon/yoga/yoga/event/event.h

@@ -89,12 +89,7 @@ struct YOGA_EXPORT Event {
 
   template <Type E>
   static void publish(const YGNode& node, const TypedData<E>& eventData = {}) {
-#ifdef YG_ENABLE_EVENTS
     publish(node, E, Data{eventData});
-#else
-    (void) node;
-    (void) eventData;
-#endif
   }
 
   template <Type E>