[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

tests/unit/common/core/test_utils.py

@@ -2,7 +2,6 @@
 
 import pytest
 from django.contrib.auth import get_user_model
-from django.db import connections
 from pyfakefs.fake_filesystem import FakeFilesystem
 from pytest_django.fixtures import DjangoAssertNumQueries, SettingsWrapper
 from pytest_mock import MockerFixture