patch applied (cabal): Remove support for using ghc-6.2

[Duncan Coutts]

Tue Jan 22 12:06:35 PST 2008  Duncan Coutts <duncan at haskell.org>
  * Remove support for using ghc-6.2
  No longer inlcude compatability hacks and remove code that handles
  the old style of ghc-pkg package registration files.

    M ./Cabal.cabal -1
    M ./Distribution/Simple/GHC.hs -17 +2
    R ./Distribution/Simple/GHC/PackageConfig.hs
    M ./Distribution/Simple/Register.hs -58 +11