Bug#904547: libgtk2-ex-podviewer-perl: Don't ship libgtk2-ex-podviewer-perl with Buster

[intrigeri]

Package: libgtk2-ex-podviewer-perl
Severity: serious
Version: 0.18-2

Let's ship as little GTK+ 2 binding as we can in Buster.
This package has no reverse-dependency in the archive.

Cheers,
-- 
intrigeri