Fix lint errors: remove unused imports

- Remove unused typing.Optional import
- Remove unused unittest.mock.MagicMock import
- Add noqa comment for necessary mlflow import in availability check

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

src/crewai/integrations/mlflow.py

@@ -1,7 +1,6 @@
 """MLFlow integration utilities for CrewAI."""
 
 import logging
-from typing import Optional
 
 logger = logging.getLogger(__name__)
 
@@ -9,7 +8,7 @@ logger = logging.getLogger(__name__)
 def is_mlflow_available() -> bool:
     """Check if MLFlow is available."""
     try:
-        import mlflow
+        import mlflow  # noqa: F401
         return True
     except ImportError:
         return False

tests/integrations/test_mlflow.py

@@ -1,7 +1,7 @@
 """Tests for MLFlow integration."""
 
 import pytest
-from unittest.mock import Mock, patch, MagicMock
+from unittest.mock import Mock, patch
 import sys