chore: Remove unused method scriptGenerator (#4671)

app/javascript/dashboard/routes/dashboard/settings/inbox/Settings.vue

@@ -436,7 +436,6 @@
 
 <script>
 import { mapGetters } from 'vuex';
-import { createMessengerScript } from 'dashboard/helper/scriptGenerator';
 import { required } from 'vuelidate/lib/validators';
 import { shouldBeUrl } from 'shared/helpers/Validators';
 import configMixin from 'shared/mixins/configMixin';
@@ -568,9 +567,6 @@ export default {
       }
       return this.inbox.name;
     },
-    messengerScript() {
-      return createMessengerScript(this.inbox.page_id);
-    },
     inboxNameLabel() {
       if (this.isAWebWidgetInbox) {
         return this.$t('INBOX_MGMT.ADD.WEBSITE_NAME.LABEL');