patch applied (packages/Cabal): Remove the ghc Makefile stuff for the old docbook xml

[Ian Lynagh]

Sun Oct 10 14:00:26 PDT 2010  Duncan Coutts <duncan at haskell.org>
  * Remove the ghc Makefile stuff for the old docbook xml
  Not woth keeping it, none of it can sensibly be reused. The GHC
  devs will need to add something new for the markdown user guide.

    R ./doc/Cabal.xml
    R ./doc/Makefile
    R ./doc/ghc.mk

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=packages/Cabal;a=darcs_commitdiff;h=20101010210026-adfee-5557f3cb3c1e8cb8c18585716e7d1a56a804c191.gz