fix: resolve ruff lint warnings in HTTP/2 code

- Remove unused imports in test files
- Rename loop variable to avoid shadowing sock import
- Remove unused ssock variable in conftest

gunicorn/workers/gthread.py

@@ -216,12 +216,12 @@ class ThreadWorker(base.Worker):
         if enabled == self._accepting:
             return
 
-        for sock in self.sockets:
+        for listener in self.sockets:
             if enabled:
-                sock.setblocking(False)
+                listener.setblocking(False)
-                self.poller.register(sock, selectors.EVENT_READ, self.accept)
+                self.poller.register(listener, selectors.EVENT_READ, self.accept)
             else:
-                self.poller.unregister(sock)
+                self.poller.unregister(listener)
 
         self._accepting = enabled
 

tests/docker/http2/conftest.py

@@ -1,7 +1,5 @@
 """Pytest fixtures for HTTP/2 Docker integration tests."""
 
-import os
-import shutil
 import subprocess
 import time
 from pathlib import Path
@@ -62,7 +60,7 @@ def wait_for_service(url: str, timeout: int = 60) -> bool:
             ctx.verify_mode = ssl.CERT_NONE
 
             with socket.create_connection((host, port), timeout=5) as sock:
-                with ctx.wrap_socket(sock, server_hostname=host) as ssock:
+                with ctx.wrap_socket(sock, server_hostname=host):
                     return True
         except (socket.error, ssl.SSLError, OSError):
             time.sleep(1)

tests/test_http2_alpn.py

@@ -10,7 +10,6 @@ import pytest
 from unittest import mock
 
 from gunicorn import sock
-from gunicorn.config import Config
 
 
 def create_mock_ssl_socket(alpn_protocol=None):

tests/test_http2_async_connection.py

@@ -20,7 +20,7 @@ except ImportError:
     H2_AVAILABLE = False
 
 from gunicorn.http2.errors import (
-    HTTP2Error, HTTP2ProtocolError, HTTP2ConnectionError
+    HTTP2Error, HTTP2ConnectionError
 )
 
 

tests/test_http2_connection.py

@@ -20,7 +20,7 @@ except ImportError:
     H2_AVAILABLE = False
 
 from gunicorn.http2.errors import (
-    HTTP2Error, HTTP2ProtocolError, HTTP2ConnectionError, HTTP2NotAvailable
+    HTTP2Error, HTTP2ConnectionError
 )
 
 

tests/test_http2_request.py

@@ -6,7 +6,6 @@
 """Tests for HTTP/2 request and body classes."""
 
 import pytest
-from unittest import mock
 
 from gunicorn.http2.request import HTTP2Request, HTTP2Body
 from gunicorn.http2.stream import HTTP2Stream

tests/test_http2_stream.py

@@ -6,7 +6,6 @@
 """Tests for HTTP/2 stream state management."""
 
 import pytest
-from unittest import mock
 
 from gunicorn.http2.stream import HTTP2Stream, StreamState
 from gunicorn.http2.errors import HTTP2StreamError