Fix lint issues: Remove unused imports from test file

- Removed unused pytest import
- Removed unused MagicMock import
- All tests continue to pass locally
- Addresses CI lint check failure

Co-Authored-By: João <joao@crewai.com>

tests/cli/test_watsonx_model_support.py

@@ -1,5 +1,4 @@
-import pytest
-from unittest.mock import patch, MagicMock
+from unittest.mock import patch
 
 from crewai.cli.constants import MODELS
 from crewai.cli.provider import select_model