Hi Sandi,
Dennis is correct, that is the way to delete the photo from WT, once the photo has been disconnected, it remains on the system for 30 days incase you wish to re-attach the photo or attach it to a different profile, before being deleted from the system, as described in this short Video: https://www.youtube.com/watch?v=nWAkQLkVAQc
Yes, I understand that's the way to disconnect the photo. How can I permanently delete it from the system? That's not really answered anywhere, is it?