Fix: Remove useless override

Author: localheinz

src/Facebook/GraphNodes/GraphObjectFactory.php

@@ -59,18 +59,6 @@ public function makeGraphObject($subclassName = null)
         return $this->makeGraphNode($subclassName);
     }
 
-    /**
-     * Convenience method for creating a GraphEvent collection.
-     *
-     * @return GraphEvent
-     *
-     * @throws FacebookSDKException
-     */
-    public function makeGraphEvent()
-    {
-        return $this->makeGraphNode(static::BASE_GRAPH_OBJECT_PREFIX . 'GraphEvent');
-    }
-
     /**
      * Tries to convert a FacebookResponse entity into a GraphEdge.
      *