Update libcachesim/trace_reader.py

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: haochengxia

libcachesim/trace_reader.py

@@ -1,7 +1,7 @@
 """Wrapper of Reader with S3 support."""
 
 import logging
-from typing import Tuple, overload, Union, Optional
+from typing import overload, Union, Optional
 from collections.abc import Iterator
 from urllib.parse import urlparse