FIx handler list mutation while removing handlers (#266)

* fix: remove handler list mutation while removing handlers

* clean

---------

Co-authored-by: Adam Hopkins <[email protected]>

Author: goodki-d

sanic_ext/extensions/logging/logger.py

@@ -54,8 +54,7 @@ async def setup_server_logging(app: Sanic):
 
     for logger_name in app.config.LOGGERS:
         logger_instance = logging.getLogger(logger_name)
-        for handler in logger_instance.handlers:
-            logger_instance.removeHandler(handler)
+        logger_instance.handlers.clear()
         logger_instance.addHandler(qhandler)