docs: def delete_index(self, refresh=False, ignore=None):
          """Removes the object from the index if `indexed=False`"""
          es = connections.get_connection("default")
          index = self.__class__.search_objects.mapping.index
          doc_type = self.__class__.search_objects.mapping.doc_type
          es.delete(index, doc_type, id=self.pk, refresh=refresh, ignore=ignore)