[commit] remove opaque enum declaration in symtab.h

[Mark Kettenis]

> Date: Wed, 19 Dec 2007 18:08:31 +0400
> From: Joel Brobecker <brobecker@adacore.com>
> 
> > > 2007-12-19  Joel Brobecker  <brobecker@adacore.com>
> > > 
> > >         * symtab.h: #include "defs.h".
> > 
> > FYI, this is not necessary; defs.h is always included first and
> > everything depends on it.
> 
> Should I remove it, then? We have other .h files that include defs.h,
> perhaps we should take care of them too...

Yes please.

Mark