Prune 9 obsolete ports

FreeBSD Ports maintainers have already deleted the following:
  deskutils/gmcal
  deskutils/mcal
  french/gfaim
  misc/libmcal
  multimedia/openmovieeditor
  multimedia/xbmc-addon-xvdr
  multimedia/xbmc-pvr
  sysutils/decomment
  sysutils/relpath