remove box red

This is a custom meta box, find the ID of this box, like with Web developer tools in Chrome or Firefox and add this ID to the custom settings. See this helpful post about how to.

* https://www.ads-software.com/support/topic/328449
* https://www.wpbeginner.com/plugins/how-to-hide-unnecessary-items-from-wordpress-admin-with-adminimize/