You can completely hide any notices added by Admin Columns with the filter ac/suppress_site_wide_notices.
The following notices won’t show up anymore:

  • Renewal notice
  • Review notice
  • Beta usage notice
  • Missing add on notice

Place the following code in your theme’s functions.php to hide the renewal message.

 * Hide all Admin Columns notices
add_filter( 'ac/suppress_site_wide_notices', '__return_true' );