cleaned code

lightrag/kg/mongo_impl.py

@@ -29,9 +29,6 @@ class MongoKVStorage(BaseKVStorage):
         self._data = database.get_collection(self.namespace)
         logger.info(f"Use MongoDB as KV {self.namespace}")
 
-    async def all_keys(self) -> list[str]:
-        return [x["_id"] for x in self._data.find({}, {"_id": 1})]
-
     async def get_by_id(self, id: str) -> dict[str, Any]:
         return self._data.find_one({"_id": id})
 
@@ -77,11 +74,6 @@ class MongoKVStorage(BaseKVStorage):
         """Drop the collection"""
         await self._data.drop()
 
-    async def get_by_status(self, status: str) -> Union[list[dict[str, Any]], None]:
-        """Get documents by status and ids"""
-        return self._data.find({"status": status})
-
-
 @dataclass
 class MongoGraphStorage(BaseGraphStorage):
     """