Fixed #34233 -- Dropped support for Python 3.8 and 3.9.

tests/db_functions/datetime/test_extract_trunc.py

@@ -1,11 +1,7 @@
+import zoneinfo
 from datetime import datetime, timedelta
 from datetime import timezone as datetime_timezone
 
-try:
-    import zoneinfo
-except ImportError:
-    from backports import zoneinfo
-
 from django.conf import settings
 from django.db import DataError, OperationalError
 from django.db.models import (