MC-4057: Fix attached mftf skipped tests

- Removed unused import

Author: Hwashiang Yu

app/code/Magento/PageBuilder/view/adminhtml/web/ts/js/panel.ts

@@ -17,7 +17,6 @@ import PageBuilder from "./page-builder";
 import PanelInterface from "./panel.d";
 import {Group} from "./panel/group";
 import {ContentType as GroupContentType} from "./panel/group/content-type";
-import {DataObject} from "./data-store";
 
 /**
  * @api