Let's kill gnome-common!

[mcatanzaro gnome org]

Hi,

I want to remove gnome-common from our BuildStream projects, but a few 
modules are still depending on it: gcr, gnome-autoar, libnotify, 
adwaita-icon-theme, gnome-menus, and gsettings-desktop-schemas.

If you help fix these sad modules, you'll earn the right to say that 
you helped fix these sad modules.

Thanks,

Michael