Cleanup code after Python 3.10 upgrade (#26520)

Signed-off-by: Lukas Geiger <lukas.geiger94@gmail.com>

benchmarks/benchmark_serving_structured_output.py

@@ -31,6 +31,7 @@ import time
 import uuid
 import warnings
 from collections.abc import AsyncGenerator
+from contextlib import nullcontext
 from dataclasses import dataclass
 
 import datasets
@@ -501,15 +502,9 @@ async def benchmark(
 
     pbar = None if disable_tqdm else tqdm(total=len(input_requests))
 
-    # This can be used once the minimum Python version is 3.10 or higher,
-    # and it will simplify the code in limited_request_func.
-    #    semaphore = (asyncio.Semaphore(max_concurrency)
-    #                 if max_concurrency else contextlib.nullcontext())
-    semaphore = asyncio.Semaphore(max_concurrency) if max_concurrency else None
+    semaphore = asyncio.Semaphore(max_concurrency) if max_concurrency else nullcontext()
 
     async def limited_request_func(request_func_input, pbar):
-        if semaphore is None:
-            return await request_func(request_func_input=request_func_input, pbar=pbar)
         async with semaphore:
             return await request_func(request_func_input=request_func_input, pbar=pbar)
 

requirements/common.txt

@@ -31,7 +31,6 @@ partial-json-parser # used for parsing partial JSON outputs
 pyzmq >= 25.0.0
 msgspec
 gguf >= 0.13.0
-importlib_metadata; python_version < '3.10'
 mistral_common[image,audio] >= 1.8.5
 opencv-python-headless >= 4.11.0    # required for video IO
 pyyaml