patch applied (cabal): Update authors list in LICENSE and remove duplicate copyright file

[Duncan Coutts]

Wed Sep  5 17:22:35 PDT 2007  Duncan Coutts <duncan at haskell.org>
  * Update authors list in LICENSE and remove duplicate copyright file
  We currently have 39 different authors, all those with a significant number
  of patches are listed as copyright holders in the LICENSE file.

    M ./LICENSE -1 +4
    R ./copyright