[arch-dev-public] Drop VI from [core] (was Re: [arch-general] Winter Cleanup of [community])

[Alexander Rødseth]

It's not a given that a vi clone is the most desirable replacement. If an
editor that is not a vi clone should be preferred, now or in the future, a
symlink named vi looks funny.

But mainly, the motivation for a thorough examination of where vi is
actually used in [core] was to bring some peace of mind to those who were
afraid of breakage. Hopefully someone appreciated the effort.

- Alexander