Dropping armel+dove z0 flavours

[Loïc Minier]

        Hi all,

 When we started supporting the armel+dove subarch in debian-cd/kernel
 etc., it was on the earliest version of the boards: Z0.  These were
 somewhat unstable and the next revision, Y0 was incompatible at the
 kernel level with them, so we had two flavours until now:
 - dove-z0 (for Dove Z0 -- surprize!)
 - dove (for Y0 and Y1)

 All people we know off with Z0 boards stopped using them as this point
 as they were superseded and replaced and were unstable anyway.
 Chatting with Brad we wondered whether it was worth keeping them in the
 tree, and we decided that since it probably mean some form of testing,
 we'd rather abstain and focus our time on other armel issues.  So we
 intend to drop them in the next week, before kernel freeze, in various
 places.

 If you have any objection and would like us to keep Z0 support along
 R2-D2 and C-3P0, speak up now.

   Thanks
-- 
Loïc Minier