RFA: remove mention of "target nrom"

[Eli Zaretskii]

> From: Tom Tromey <tromey@redhat.com>
> Cc: Tom Tromey <tromey@redhat.com>
> Date: Tue,  2 Jul 2013 10:38:01 -0600
> 
> The documentation refers to "target nrom", but this target doesn't
> appear in the tree.  It was zapped here:
> 
> 2002-12-16  Andrew Cagney  <ac131313@redhat.com>
> [...]
>         * remote-nrom.c, remote-os9k.c, remote-vx960.c: Delete.
> 
> This patch removes the reference from the documentation.
> 
> Ok?

Yes, thanks.