refactor: remove unused imports from test files

Author: Ayaz-Microsoft

src/tests/backend/test_app.py

@@ -13,8 +13,7 @@
 import pytest
 import sys
 import os
-from unittest.mock import Mock, AsyncMock, patch, MagicMock, NonCallableMock
-from types import ModuleType
+from unittest.mock import Mock, AsyncMock, patch, NonCallableMock
 
 # Environment variables are set by conftest.py, but ensure they're available
 os.environ.setdefault("APPLICATIONINSIGHTS_CONNECTION_STRING", "InstrumentationKey=test-key-12345")

src/tests/backend/v4/orchestration/helper/test_plan_to_mplan_converter.py

@@ -11,7 +11,7 @@
 
 import unittest
 import sys
-from unittest.mock import Mock, MagicMock, NonCallableMock
+from unittest.mock import NonCallableMock
 
 import pytest