For now, Terry has decided that translations can't be done by just
anyone. This note here should discourage at least some people from
making pull requests to add their own translations.
Mentioning 2.3 here is going to be anachronistic when 2.4 exists. And
there's not really any point in bumping this version number every time
the game's version number is bumped as well. So it's best to just remove
it.