diff --git a/internlm/initialize/launch.py b/internlm/initialize/launch.py
index ddf380a..2d3ec2f 100644
--- a/internlm/initialize/launch.py
+++ b/internlm/initialize/launch.py
@@ -2,7 +2,6 @@
 # -*- encoding: utf-8 -*-
 
 import argparse
-import gc
 import os
 from pathlib import Path
 from typing import Dict, Union