Removing shutdown menu item

[Bruno Wolff III]

On Wed, May 12, 2010 at 23:06:44 -0700,
  Suvayu Ali <fatkasuvayu+linux at gmail.com> wrote:
> On Wednesday 12 May 2010 09:59 PM, Bruno Wolff III wrote:
> >
> > You can also prohibit it using policy. That's probably a better way to do it.
> 
> My question is a little off topic here but still, does F13 have the 
> gui(polkit-gnome-authorization) to set the policies? As far as I know it 
> was dropped for F12. I found that little utility to be very useful in 
> F11 and F10.

Apparently not. I am not sure if there is any easy way to do this any more.
I used to use that tool.