Bug#904561: libgtk2-gladexml-perl: Don't ship libgtk2-gladexml-perl in Buster

[intrigeri at debian.org]

Package: libgtk2-gladexml-perl
Version: 1.007-2
Severity: serious

Let's ship as little GTK+ 2 bindings as we can in Buster.

This package has only 4 reverse-dependencies, 3 of which are unlikely
to be part of Buster anyway:

 - libgtk2-gladexml-simple-perl: filed #904551 to avoid shipping it in Buster
 - gresolver: not in testing (depends on obsolete libgnome)
 - gtkorphan: filed a bug to request removing the dependency
 - macchanger-gtk: not in testing, filed a bug to request removing the
   dependency anyway