Fix lint issues and add parameter validation

- Remove unused Optional import from mlflow.py
- Add noqa comment for mlflow import in try block
- Add parameter type validation with TypeError for non-boolean inputs
- Add MLflow listener import to events/__init__.py
- Clean up unused imports in test files

Addresses code review feedback from João regarding parameter validation
and return type annotations while fixing CI lint failures.

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

src/crewai/integrations/mlflow.py

@@ -1,6 +1,5 @@
 """MLflow integration for CrewAI"""
 import logging
-from typing import Optional
 
 from crewai.utilities.events.crewai_event_bus import crewai_event_bus
 from crewai.utilities.events.third_party.mlflow_listener import mlflow_listener
@@ -18,9 +17,14 @@ def autolog(
     Args:
         disable: If True, disable autologging. If False, enable it.
         silent: If True, suppress logging messages.
+        
+    Raises:
+        TypeError: If disable or silent are not boolean values.
     """
+    if not isinstance(disable, bool) or not isinstance(silent, bool):
+        raise TypeError("Parameters 'disable' and 'silent' must be boolean")
     try:
-        import mlflow
+        import mlflow  # noqa: F401
     except ImportError:
         if not silent:
             logger.warning(

src/crewai/utilities/events/third_party/mlflow_listener.py

@@ -1,4 +1,4 @@
-from typing import Optional, Dict, Any
+from typing import Dict, Any
 import logging
 
 from crewai.utilities.events.crew_events import (

tests/test_mlflow_final.py

@@ -1,8 +1,7 @@
 """
 Final test for MLflow integration issue #2947
 """
-import pytest
-from unittest.mock import Mock, patch
+
 
 
 def test_mlflow_autolog_availability():