style: remove unused imports flagged by ruff

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: xr843

tests/cli/test_utils.py

@@ -1,8 +1,6 @@
 import shutil
-import subprocess
 import sys
 from pathlib import Path
-from typing import Any
 
 import pytest