Remove $lang.wikimediafoundation.org

The $lang.wikimediafoundation.org CNAMEs have been pointed to a hostname
that doesn't exist, text.wikimedia.org. Since noone has noticed it for a
long time and languages are useless for foundationwiki, remove the
CNAMEs altogether.

Change-Id: I270d74898bc962327f8fcabc8c9a170cbaea5016