patch applied (cabal): We don't need a short option configure flag for selecting nhc

[Duncan Coutts]

Thu Aug 16 21:30:21 PDT 2007  Duncan Coutts <duncan at haskell.org>
  * We don't need a short option configure flag for selecting nhc
  I don't think we need one for ghc either, but perhaps we shouldn't remove
  that immediately as people might be using it. It's safe to remove -n now
  becuase nobody is relying on it as nhc support is still incomplete.

    M ./Distribution/Setup.hs -1 +1