[hook] cleaning: `parent` arg is no more used

hooks.py

@@ -99,10 +99,6 @@
             # kwargs below must be container data.
             kwargs['id'] = json['eid']
             kwargs['doc_type'] = getattr(serializer, 'doc_type', json['cw_etype'])
-            if json.get('parent'):
-                kwargs['parent'] = json.pop('parent')
-            else:  # TODO only for types that have parents
-                kwargs['routing'] = entity.eid
             try:
                 # TODO option for async ?
                 es.index(**kwargs)