Revert "Fixing erronous cherry-pick change in EventHandler"

This reverts commit 95976b4f6b.

akka-actor/src/main/scala/akka/event/EventHandler.scala

@@ -272,7 +272,11 @@ object EventHandler extends ListenerManagement {
   }
 
   class DefaultListener extends Actor with StandardOutLogger {
-    def receive = { case event ⇒ print(event) }
+    self.dispatcher = EventHandlerDispatcher
+
+    def receive = {
+      case event ⇒ print(event)
+    }
   }
 
   start()