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

test_mma_persistence.py

@@ -1,9 +1,7 @@
 
-import os
 import unittest
 from pathlib import Path
 import project_manager
-from models import Track, Ticket
 
 class TestMMAPersistence(unittest.TestCase):
  def test_default_project_has_mma(self) -> None: