Comment # 2 on bug 1134757 from Stephan Kulow

The idea behind this check is to make sure we provide a meaningful set of
locales as distribution. If a single package provides translations to lower
sorbian, it doesn't mean it's useful on openSUSE as we lack all the other
pieces in it.

So if you package for openSUSE, your users prefering lower sorbian will
possibly not see all the strings possible, but at least they get something we
support.

As the list of locales is very old, it can surely be updated in case languages
got greater support within the GNU/Linux world by now, but adding them for the
sake of a single package is wrong.

Disabling the removal sounds like a feature worth to support though.