RFA: Delete broken and unused HPUXHPPA code

[Joel Brobecker]

> Since nobody has noticed it, it's clear that nobody has compiled this
> code with HPUXHPPA defined for two and a half years.  The block of
> code itself dates from GDB's prehistory.  This is the only "HPUXHPPA"
> block in all of GDB.

I can see in the ChangeLog that the HPUXHPPA define was actually
defined in one of the nm files. It's not defined anywhere anymore
so it's another argument in favor of the fact that it's not used
anymore.

> gdb/ChangeLog:
> 2007-08-29  Jim Blandy  <jimb@codesourcery.com>
> 
> 	* breakpoint.c (watch_command_1): Remove '#ifdef HPUXHPPA' block;
> 	this code has not been compiled for two years.

-- 
Joel