removed unsued import to satisfy ruff

Author: Kosinkadink

app/assets/database/queries.py

@@ -3,7 +3,7 @@
 from sqlalchemy import select, exists, func
 from sqlalchemy.orm import Session, contains_eager, noload
 from app.assets.database.models import Asset, AssetInfo, AssetInfoMeta, AssetInfoTag, Tag
-from app.assets.helpers import escape_like_prefix, normalize_tags, utcnow
+from app.assets.helpers import escape_like_prefix, normalize_tags
 from typing import Sequence