Reduce linter errors

tests/adapter_tests/subsonic_adapter_tests.py

@@ -1,10 +1,9 @@
-import importlib
 import json
 import logging
 import re
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
-from typing import Any, Dict, Generator, Optional, Tuple, Union
+from typing import Any, Generator, Tuple
 
 import pytest