Remove unknown.exp

[Joel Brobecker]

Volodya,

> Per http://article.gmane.org/gmane.comp.gdb.devel/19790, I've committed
> the attached patch to remove testsuite/config/unknown.exp.

This is a tiny detail, but I think it would be better if the URL
you posted was refering to sourceware.org.  It's pretty easy to find
a given message when you go to:

        http://www.sourceware.org/ml/gdb-patches/

The idea is that we have some form of control of what goes in sourceware,
but I have not checked what gmane.org's policy is. I think it will make
safer later on if we need to do some archeology.

-- 
Joel