fix: ruff findings

tests/test_store_group_access.py

@@ -6,7 +6,6 @@ instead of degrading to the Store fault view; (2) even group members could
 not open the WAL-mode store because root-created sidecars lacked group write
 and the store directory lacked group execute-then-write.
 """
-import sqlite3
 import sys
 from pathlib import Path
 
@@ -14,7 +13,7 @@ import pytest
 
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
-from fenris.store import DEFAULT_STORE_PATH, init_store
+from fenris.store import init_store
 from fenris.status import StoreFault, open_store_readonly