Revert "bind method canvas_item_set_sort_children_by_y"

This reverts commit 1f9e16119f2b17fa507bdee8529459ed91f27b8c.
Same rationale as previous revert.

servers/visual_server.cpp

@@ -531,7 +531,6 @@ void VisualServer::_bind_methods() {
 	ObjectTypeDB::bind_method(_MD("canvas_item_set_self_opacity"),&VisualServer::canvas_item_set_self_opacity);
 	ObjectTypeDB::bind_method(_MD("canvas_item_get_self_opacity"),&VisualServer::canvas_item_get_self_opacity);
 	ObjectTypeDB::bind_method(_MD("canvas_item_set_z"),&VisualServer::canvas_item_set_z);
-	ObjectTypeDB::bind_method(_MD("canvas_item_set_sort_children_by_y"),&VisualServer::canvas_item_set_sort_children_by_y);
 
 	ObjectTypeDB::bind_method(_MD("canvas_item_add_line"),&VisualServer::canvas_item_add_line, DEFVAL(1.0), DEFVAL(false));
 	ObjectTypeDB::bind_method(_MD("canvas_item_add_rect"),&VisualServer::canvas_item_add_rect);