Refactor utils.py by removing old comments

Removed unnecessary comments and cleaned up code.

utils.py

@@ -45,10 +45,6 @@ def load_json(path):
     try:
         with open(path, 'r') as f:
             data = json.load(f)
-            
-        # Ensure migration happens if loading old file
-        # We don't change structure here, HistoryTree class handles logic
-        
         return data, get_file_mtime(path)
     except:
         return DEFAULTS.copy(), 0