[PR #10675/048ef4c backport][3.12] Remove useless nonlocal statements in tests (#10678)

discovered by new flake8 in
#10653

(cherry picked from commit 048ef4c)

Author: bdraco

tests/test_client_ws_functional.py

@@ -315,7 +315,6 @@ async def test_concurrent_close(aiohttp_client) -> None:
     client_ws = None
 
     async def handler(request):
-        nonlocal client_ws
         ws = web.WebSocketResponse()
         await ws.prepare(request)
 
@@ -936,7 +935,7 @@ async def delayed_send_frame(
         message: bytes, opcode: int, compress: Optional[int] = None
     ) -> None:
         assert opcode == WSMsgType.PING
-        nonlocal cancelled, ping_started
+        nonlocal cancelled
         ping_started.set_result(None)
         try:
             await asyncio.sleep(1)

tests/test_helpers.py

@@ -351,7 +351,6 @@ async def test_timer_context_timeout_does_swallow_cancellation() -> None:
     ctx = helpers.TimerContext(loop)
 
     async def task_with_timeout() -> None:
-        nonlocal ctx
         new_task = asyncio.current_task()
         assert new_task is not None
         with pytest.raises(asyncio.TimeoutError):

tests/test_web_server.py

@@ -347,7 +347,6 @@ async def test_handler_cancellation(unused_port_socket: socket.socket) -> None:
     port = sock.getsockname()[1]
 
     async def on_request(_: web.Request) -> web.Response:
-        nonlocal event
         try:
             await asyncio.sleep(10)
         except asyncio.CancelledError:
@@ -389,7 +388,7 @@ async def test_no_handler_cancellation(unused_port_socket: socket.socket) -> Non
     started = False
 
     async def on_request(_: web.Request) -> web.Response:
-        nonlocal done_event, started, timeout_event
+        nonlocal started
         started = True
         await asyncio.wait_for(timeout_event.wait(), timeout=5)
         done_event.set()