Remove unused imports

tools/performance/engine-benchmarks/bench_tool/gh.py

@@ -1,15 +1,10 @@
+import asyncio
 import base64
 import json
 import logging
-import os
-from os import path
-from typing import List, Dict, Optional, Set, Tuple, Union, Any
-import re
 import subprocess
 import sys
-from argparse import ArgumentParser
-import shutil
-import asyncio
+from typing import Dict, Optional, Union, Any
 from urllib.parse import urlencode
 
 _logger = logging.getLogger(__name__)