Improve bench_one_batch_server script (#9608)

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

python/sglang/profiler.py

@@ -9,7 +9,6 @@ import argparse
 import json
 import os
 import time
-import urllib.parse
 from argparse import ArgumentParser
 from pathlib import Path
 from typing import List, Optional