Plugin leaves orphan entries in db

Hi

I installed your plugin sometime ago and decided to remove it.

I have found that with wp spring clean these db tables are left behind and not removed with the plugin:

wp_knewsautomated
wp_knewsautomatedposts
wp_knewsautomatedsel
wp_knewsextrafields
wp_knewskeys
wp_knewsletters
wp_knewslists
wp_knewstats
wp_knewsubmits
wp_knewsubmitsdetails
wp_knewsusers
wp_knewsusersextra
wp_knewsuserslists

It would be nice to remove all entries the plugin adds to a database when it is removed from a site.

https://www.ads-software.com/plugins/knews/