removed get_knowledge_graph

lightrag/kg/postgres_impl.py

@@ -7,7 +7,6 @@ from typing import Any, Union, final
 import numpy as np
 import configparser
 
-from lightrag.types import KnowledgeGraph
 
 import sys
 from tenacity import (
@@ -1093,11 +1092,6 @@ class PGGraphStorage(BaseGraphStorage):
     ) -> tuple[np.ndarray[Any, Any], list[str]]:
         raise NotImplementedError
 
-    async def get_knowledge_graph(
-        self, node_label: str, max_depth: int = 5
-    ) -> KnowledgeGraph:
-        raise NotImplementedError
-
     async def drop(self) -> None:
         """Drop the storage"""
         drop_sql = SQL_TEMPLATES["drop_vdb_entity"]