chore(ruff) Autofixes for ruff with Python 3.10+

uv run ruff check . --fix --show-fixes

Fixed 1 error:
- tests/test_example.py:
    1 × F401 (unused-import)

Found 22 errors (1 fixed, 21 remaining).
No fixes available (8 hidden fixes can be enabled with the `--unsafe-fixes` option).

Author: tony

tests/test_example.py

@@ -2,7 +2,6 @@
 
 from __future__ import annotations
 
-import importlib
 import importlib.util
 import sys
 import typing as t