Bug#945137: needlessly build-depends on deprecated gnome-doc-utils

[Andreas Henriksson <andreas@fatal.se>]

Package: cinnamon-desktop
Version: 4.2.0-2

Hello,

It seems to me like your package needlessly build-depends on the
gnome-doc-utils package which has been deprecated for >5 years.

I've tested dropping the build-dependency and your package still
built without problems for me.

(The NEWS file, which seems to be pre-fork era, also explicitly mentions
porting from gnome-doc-utils to yelp.)

You are currently draggin in gnome-doc-utils into key packages[1]
subset. Please thus consider fixing this issue as soon as possible.

Regards,
Andreas Henriksson

[1]: https://udd.debian.org/cgi-bin/key_packages.yaml.cgi