[Xmonad] darcs patch: remove StackOrNot type synonymn.

[Don Stewart]

mailing_list:
> On Thu, Oct 18, 2007 at 10:43:49AM -0700, David Roundy wrote:
> > I thought I sent this before, but don't see it in my mailbox...
> 
> I have it in mine. But I haven't seen the 0.4 announce so far... which
> means I'm not the only one having problems with the ML.

the announce definitely went through. see here, 

    http://www.haskell.org/pipermail/xmonad/2007-October/002906.html

-- Don