chore: apply ruff auto-fixes and remove dead AST scripts

tests/test_mma_orchestration_gui.py

@@ -1,7 +1,6 @@
 import pytest
 import json
-from unittest.mock import patch, MagicMock
-import threading
+from unittest.mock import patch
 import time
 from gui_2 import App
 
@@ -56,8 +55,7 @@ def test_cb_plan_epic_launches_thread(app_instance: App) -> None:
  with (
   patch('orchestrator_pm.get_track_history_summary', return_value="History summary") as mock_get_history, 
   patch('orchestrator_pm.generate_tracks', return_value=mock_tracks) as mock_gen_tracks, 
-  patch('aggregate.build_file_items', return_value=[]) as mock_build_files
- ):
+  patch('aggregate.build_file_items', return_value=[])):
  # We need to mock project_manager.flat_config and project_manager.load_project
   with (
    patch('project_manager.load_project', return_value={}),