Remove unused imports (#12730)

packages/frontend/src/pages/settings/notifications.vue

@@ -55,7 +55,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
-import { defineAsyncComponent, shallowRef, computed } from 'vue';
+import { shallowRef, computed } from 'vue';
 import XNotificationConfig from './notifications.notification-config.vue';
 import FormLink from '@/components/form/link.vue';
 import FormSection from '@/components/form/section.vue';