many optimizations and bug fixes

libs/song_hash.py

@@ -76,13 +76,6 @@ def build_song_hashes(output_dir=Path("cache")):
     all_tja_files: list[Path] = []
     for root_dir in tja_paths:
         root_path = Path(root_dir)
-        '''
-        if (root_path / '.git').exists():
-            repo = Repo(root_path)
-            origin = repo.remotes.origin
-            origin.pull()
-            print('Pulled latest from', root_path)
-        '''
         all_tja_files.extend(root_path.rglob("*.tja"))
 
     global_data.total_songs = len(all_tja_files)