Retire the Afrikaans and Walliser German "translations"
They have not been touched in over 20 years, and have effectively
bitrotted to the point where they are effectively untranslated.
Any interest in these translations would have to effectively start from
scratch anyway, so let's stop pretending the status quo is useful.
Change-Id: I13e1ae920883f5babb232f0592076be24c8122d4