diff --git a/phpBB/includes/notification/method/interface.php b/phpBB/includes/notification/method/interface.php
index f5c210a2fc..3c6c757d5c 100644
--- a/phpBB/includes/notification/method/interface.php
+++ b/phpBB/includes/notification/method/interface.php
@@ -34,11 +34,6 @@ interface phpbb_notification_method_interface
 	*/
 	public function add_to_queue(phpbb_notification_type_interface $notification);
 
-	/**
-	* Empty the queue
-	*/
-	protected function empty_queue();
-
 	/**
 	* Parse the queue and notify the users
 	*/