Delete gdb-mi.el

[Nick Roberts]

 > > CVS Emacs now uses GDB/MI directly so this file is no longer
 > > relevant and I would to remove it.
 > 
 > People who use CVS Emacs do not necessarily use CVS GDB, and vice
 > versa.

The file in the GDB repository had the same name as the one in the Emacs
repository.  It was only a proof of concept and there was never any interest
expressed in it.  I wanted to remove it now to avoid confusion in the future.
Anyone wishing to just debug with GDB in Emacs would do best to use the mode
that comes with his/her version of Emacs.

-- 
Nick                                           http://users.snap.net.nz/~nickrob