endpoint: remove unneeded ref/unref

lib/wp/endpoint.c

@@ -345,9 +345,7 @@ wp_endpoint_unregister (WpEndpoint * self)
     g_info ("WpEndpoint:%p unregistering '%s' (%s)", self, priv->name,
         priv->media_class);
 
-    g_object_ref (self);
     wp_core_remove_global (core, WP_GLOBAL_ENDPOINT, self);
-    g_object_unref (self);
   }
 }