async def adelete_index_struct(self, key: str) -> None:
        """
        Asynchronously delete an index struct.

        Args:
            key (str): index struct key

        """
        await self._kvstore.adelete(key, collection=self._collection)

        Asynchronously delete an index struct.

        Args:
            key (str): index struct key

        
llama-index-core/llama_index/core/storage/index_store/keyval_index_store.py