Enable test_integration on windows

Author: sowmya-jaxl

tests/integration/test_integration.py

@@ -210,10 +210,6 @@ def proxy_py_subprocess(request: Any) -> Generator[int, None, None]:
     PROXY_PY_FLAGS_INTEGRATION,
     indirect=True,
 )   # type: ignore[misc]
-@pytest.mark.skipif(
-    IS_WINDOWS,
-    reason='OSError: [WinError 193] %1 is not a valid Win32 application',
-)  # type: ignore[misc]
 def test_integration(proxy_py_subprocess: int) -> None:
     """An acceptance test using ``curl`` through proxy.py."""
     this_test_module = Path(__file__)