fix: remove unneeded import

Author: ilbertt

context_use/store/sqlite/store.py

@@ -1,5 +1,3 @@
-from __future__ import annotations
-
 import json
 import logging
 from collections import defaultdict

tests/integration/conftest.py

@@ -1,5 +1,3 @@
-from __future__ import annotations
-
 import os
 from collections.abc import AsyncGenerator
 from pathlib import Path

tests/unit/store/test_sqlite.py

@@ -1,5 +1,3 @@
-from __future__ import annotations
-
 from collections.abc import AsyncGenerator
 from datetime import UTC, date, datetime