remove setLoggerClass to TomwerClass by default

tomwer/core/log/logger.py

@@ -117,9 +117,6 @@ class TomwerLogger(logging.Logger):
         return self.name
 
 
-logging.setLoggerClass(TomwerLogger)
-
-
 if __name__ == '__main__':
     logger = TomwerLogger(logging.getLogger('test logger'))
     logger.debug('debug message')