I've asked this several times over the past years of using this software. Still no good answer.
WHEN WILL WE BE ABLE TO DELETE CONTENT - AND HAVE IT STAY DELETED?
We clean up our files only to have them keep reappearing in our library. This seems like the most basic of features (if you can even consider it a 'feature'). Very frustrating. I've seen posts of fixes coming and still this is an issue.