refactor (#1124)

### What problem does this PR solve?


### Type of change

- [x] Refactoring

api/utils/log_utils.py

@@ -154,11 +154,6 @@ class LoggerFactory(object):
                                                delay=True)
         if level:
             handler.level = level
-        else:
-            handler.level = LoggerFactory.LEVEL
-
-        formatter = logging.Formatter(LoggerFactory.LOG_FORMAT)
-        handler.setFormatter(formatter)
 
         return handler