Pretty sure this has been done, but can't find it: Strip out old "thread moved" links
 

I thought there was a hack that puts a new feature into the admin or mod cp, that lets you delete/remove/strip out older moved thread links. You know, the link that gets left in the thread's original forum when you move a thread with a redirect. You were able to select a time cut-off, so that any of those links older than xx amount of days would be stripped out. I tried to find this hack here, but couldn't; does anyone remember what it was called, who wrote it, or can find it for me?

i think you mean that one:
https://vborg.vbsupport.ru/showthrea...emove+redirect

Yep, that's it, thanks! :)