style: fix ruff lint and format issues

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

Author: cpcloud

toolshed/check_release_notes.py

@@ -45,9 +45,7 @@ def notes_path(package: str, version: str) -> str:
     return os.path.join(package, "docs", "source", "release", f"{version}-notes.rst")
 
 
-def check_release_notes(
-    git_tag: str, component: str, repo_root: str = "."
-) -> list[tuple[str, str]]:
+def check_release_notes(git_tag: str, component: str, repo_root: str = ".") -> list[tuple[str, str]]:
     """Return a list of (path, reason) for missing or empty release notes.
 
     Returns an empty list when all notes are present and non-empty.

toolshed/tests/test_check_release_notes.py

@@ -6,8 +6,6 @@
 import os
 import sys
 
-import pytest
-
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
 from check_release_notes import (
     check_release_notes,