Update usage of useDeleteItems

* Update usage of useDeleteItems.
* Remove async when not necessary
* Update return of promises

awx/ui_next/src/screens/NotificationTemplate/NotificationTemplateList/NotificationTemplateList.jsx

@@ -67,7 +67,7 @@ function NotificationTemplatesList({ i18n }) {
     deletionError,
     clearDeletionError,
   } = useDeleteItems(
-    useCallback(async () => {
+    useCallback(() => {
       return Promise.all(
         selected.map(({ id }) => NotificationTemplatesAPI.destroy(id))
       );