[rfa] doc/gdbint.texinfo: remove reference to REG_STACK_SEGMENT

[Eli Zaretskii]

> Date: Fri, 12 Apr 2002 17:38:55 -0500
> From: Michael Elizabeth Chastain <mec@shout.net>
> 
> This removes another dead symbol from "Obsolete Conditionals"
> in gdbint.texinfo.  The symbol is REG_STACK_SEGMENT.  It was last used
> in the Pyramid code in gdb 4.18.
> 
> After this patch, "Obsolete Conditionals" has only one symbol left,
> but that symbol is still in use.
> 
> OK to apply?

Yes, thanks.