fix: Remove unused import of load_strategy in test_pipeline.py

Author: Akanshu-2u

auth_backends/tests/test_pipeline.py

@@ -3,7 +3,6 @@
 from unittest.mock import patch, MagicMock
 from django.contrib.auth import get_user_model
 from django.test import TestCase
-from social_django.utils import load_strategy
 
 from auth_backends.pipeline import get_user_if_exists, update_email