I just saw that this wiki has more than 1000 unused images: https://userbase.kde.org/index.php?title=Special:UnusedFiles&limit=5000 That should we do about this? Delete them, or just ignore them?
I wanted to use https://userbase.kde.org/Special:ListFiles to track the remaining screenshots to update, but it's difficult to find old screenshots that are used somewhere.
I think it is safe to delete icons and screenshots for English locale. Localized screenshots with some low probability level can be reused. Do you need some help to do this?