Fix type error.

src/web/test/unit/create_app.py

@@ -4,7 +4,7 @@
 from contextlib import _GeneratorContextManager  # pyright: ignore[reportPrivateUsage]
 from contextlib import ExitStack
 from functools import lru_cache
-from typing import Any, Callable, Generator, NamedTuple, Protocol, cast
+from typing import Any, Generator, NamedTuple, Protocol, cast
 
 import json_logging
 import pytest