Remove or revamp region page
The region
page was patched out of the list of pages back in 2014: a3c70fd2. cb66d893 made its use a configure-time parameter, off by default. It is redundant with the current implementation of the language page, which include regional language variants in the language list. I think we should remove it from the codebase.
I had assumed that, since it was disabled in source for 4 years, no-one would use it, but in fact at least the following distros enable it:
- Arch since 3.32
- NixOS
- (Possibly others – I didn't check every distro on https://repology.org/project/gnome-initial-setup/versions)
I don't think this page should be optional – it should either be included (and incorporated into the design of the language page) or removed.