test_database_sync_to_async: only use fix

Author: blueyed

tests/test_db.py

@@ -10,7 +10,7 @@
     "django.db.backends.postgresql",
 ))
 @pytest.mark.parametrize("conn_max_age", (0, 600))
-@pytest.mark.parametrize("use_fix", (True, False))
+@pytest.mark.parametrize("use_fix", (True,))
 async def test_database_sync_to_async(db_engine, conn_max_age, use_fix, testdir):
     if db_engine == "django.db.backends.postgresql":
         pytest.importorskip("psycopg2")