Hello , On 9 November 2016 Rex Dieter proposed retire some packages (uncommon kde4 language bindings) [1]
Today Petr retired smokeqt and perl-Qt (the last ones of the list) , debconf-kde now doesn't depends on perl-Qt. I will take care of remove debconf-kde sub-package ... Upstream also already doesn't have it and upstream have a new independent package debconf-kde [2]
Cheers,
[1] https://lists.fedoraproject.org/archives/list/kde@lists.fedoraproject.org/th...
[2] https://tracker.debian.org/pkg/debconf-kde https://tracker.debian.org/pkg/debconf