The MeeGo distribution is still a supported distribution, but
will probably not see an updated version of systemd anymore.

Most of the development is focussing on Tizen now, and the
generic support for building --with-distro=other is more than
adequate enough.

This patch removes the support as a custom configuration build
target in systemd. People who are still building this for
the MeeGo distribution should build as "other" distro.