diff --git a/models/chatglm_llm.py b/models/chatglm_llm.py
index 22b9694..eab19ee 100644
--- a/models/chatglm_llm.py
+++ b/models/chatglm_llm.py
@@ -1,6 +1,4 @@
 import json
-import os
-
 from langchain.llms.base import LLM
 from typing import Optional, List
 from langchain.llms.utils import enforce_stop_tokens