Prune 12 obsolete ports

FreeBSD Ports maintainers have already deleted the following:
  archivers/star
  converters/konwert
  databases/firebird20-client
  devel/msp430-gcc3
  editors/ved
  graphics/GraphicsMagick12
  japanese/chasen
  net-im/tkabber-devel
  net/ipfw-graph
  ports-mgmt/pver
  security/clamav-devel
  www/openx