diff --git a/models/chatglm_llm.py b/models/chatglm_llm.py
index e69ce87..2ca7790 100644
--- a/models/chatglm_llm.py
+++ b/models/chatglm_llm.py
@@ -1,13 +1,9 @@
 import json
 from langchain.llms.base import LLM
-from typing import Optional, List
-from langchain.llms.utils import enforce_stop_tokens
+from typing import List, Dict, Optional
 from transformers import AutoTokenizer, AutoModel, AutoConfig
 import torch
 from configs.model_config import *
-from langchain.callbacks.base import CallbackManager
-from langchain.callbacks.streaming_stdout import StreamingStdOutCallbackHandler
-from typing import Dict, Tuple, Union, Optional
 from utils import torch_gc
 
 DEVICE_ = LLM_DEVICE
@@ -53,7 +49,6 @@ class ChatGLM(LLM):
     tokenizer: object = None
     model: object = None
     history_len: int = 10
-    callback_manager = CallbackManager([StreamingStdOutCallbackHandler()])
 
     def __init__(self):
         super().__init__()