Remove unecessary _set_global_invalid added by mistake

scene/main/canvas_item.cpp

@@ -277,8 +277,6 @@ void CanvasItem::_notification(int p_what) {
 			ERR_MAIN_THREAD_GUARD;
 			ERR_FAIL_COND(!is_inside_tree());
 
-			_set_global_invalid(true);
-
 			Node *parent = get_parent();
 			if (parent) {
 				CanvasItem *ci = Object::cast_to<CanvasItem>(parent);