clean up osx_appl.ss, since the uninstalled mzscheme executable now finds its framework and collections without help
clean up osx_appl.ss, since the uninstalled mzscheme executable now finds its framework and collections without help

svn: r3279

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket