Ask us, and we remove it. It costs nothing and it does not depend on your plan.
The quickest way is the Remove branding button on the app home page, which opens the chat with the request already written. Or just open the chat in the bottom right corner of the app and say so.
There is deliberately no switch for it in the settings. It is a short line under the subscription widget on your product page, and taking it off is something we do on our side, so if you cannot find the setting you are not missing it.
Not seeing the line at all, and no button on the home page? Then your store does not carry it. The badge was only ever added to stores that installed the app after it shipped, so an older store has nothing to remove.
Stuck on any of this? Open the chat in the bottom right corner of the app and we will help you set it up.