Prune 12 obsolete ports

FreeBSD Ports maintainers have already deleted the following:
  audio/bebocd
  deskutils/gmcal
  deskutils/mcal
  french/gfaim
  games/deal
  japanese/grep
  mail/muttzilla
  misc/libmcal
  multimedia/openmovieeditor
  www/comclear
  www/nscache
  www/runsomebrowser