diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 065b9a85a..2b78eadee 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -14,7 +14,7 @@ import threading
 import time
 import traceback
 from collections import defaultdict
-from datetime import datetime, timedelta
+from datetime import datetime
 from json.decoder import JSONDecodeError
 from pathlib import Path