proposal: remove ROMP support

[Andrew Cagney]

> As part of my quest to eliminate rotting files from the gdb and src
> trees, I propose deleting the contents of gdb/config/romp/ .  It looks
> like romp support isn't currently functional and hasn't been for a
> while.

Hmm, I keep deleting the romp but it then keeps re-appearing somewhere 
else ...

> If I'm wrong, someone can correct me.  If I'm right, someone with write
> access can nuke that directory.

Let me have another go :-)

Andrew