remove UserEffectiveGroups

Signed-off-by: WaitSpring <me@waitspring.com>

src/PermissionsHook.php

@@ -14,8 +14,7 @@ use Title;
 use User;
 
 class PermissionsHook implements
-    getUserPermissionsErrorsHook,
-    UserEffectiveGroupsHook
+    getUserPermissionsErrorsHook
 {
     /** @var permissionManager */
     private $permissionManager;