In reply to Ahmad Awais.

EDIT: This is how it is.

Just figured the master and admin-ui branches are different and we don't need the old plugin. Though the master branch does.

So, if you are downloading via the master branch zip link, then you need to have the old WordPress Importer plugin installed.

But if you are testing the new `admin-ui` branch, then you don't need the old WP importere. For downloading a zip for this `admin-ui` branch click this zip link.