MarsSeed  filed a deletion request for kdesudo :
It's been deprecated for years now, please delete it. Users can use kdesu, it can be configured to use sudo instead of su.
Launchpad source last updated in 2011. It informs the user as such: Moved to KDE https://projects.kde.org/kdesudo
But the latter is not found. If it's ever existed, it has been discontinued completely.