forgot to save some changes for last commit

docs/metadesk_reference.md

@@ -1166,14 +1166,6 @@ MD_MapOverwrite: {
     return: *MD_Node,
 };
 
-// TODO(allen): eliminate
-@send(Nodes)
-@func MD_PushSibling: {
-    first: **MD_Node,
-    last: **MD_Node,
-    new_sibling: *MD_Node,
-};
-
 @send(Nodes)
 @func MD_PushChild: {
     parent: *MD_Node,