Translators have been getting compensated for localization. Sometimes
they submit pull requests for their changes, but just because they do
doesn't mean that they won't get compensated.
The intent of this line was to make sure that any random contributor
wouldn't expect any compensation for their changes, so adding another
clause here still keeps that expectation while making it clear that it's
not like Terry _never_ compensates people. Even if, as a Swedish man
once sung, "Terry is a monster, I think we all know that".
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.