delete unuse code

src/client/js/components/Admin/SlackIntegration/CustomBotWithoutProxySettingsAccordion.jsx

@@ -36,7 +36,6 @@ const CustomBotWithoutProxySettingsAccordion = ({
         slackBotToken,
         currentBotType,
       });
-      fetchData();
       toastSuccess(t('toaster.update_successed', { target: t('admin:slack_integration.custom_bot_without_proxy_settings') }));
     }
     catch (err) {