patch applied (cabal): delete removePreprocessed function, it's unused except for cleaning jhc files

Sat Jan 26 15:02:56 PST 2008 Duncan Coutts * delete removePreprocessed function, it's unused except for cleaning jhc files and jhc should just be putting its generated files under dist/ anyway. The latter issue is filed as bug #219. M ./Distribution/Simple.hs -14 M ./Distribution/Simple/PreProcess.hs -28