Prune 22 obsolete ports

FreeBSD Ports maintainers have already deleted the following:
  deskutils/kdepim44
  deskutils/kdepim44-runtime
  games/py-ski
  misc/kde-xdg-env
  misc/kde4-shared-mime-info
  multimedia/youtube-viewer
  textproc/docbook-241
  textproc/docbook-300
  textproc/docbook-310
  textproc/docbook-400
  textproc/docbook-410
  textproc/docbook-420
  textproc/docbook-430
  textproc/docbook-440
  textproc/docbook-450
  textproc/docbook-500
  textproc/docbook-sk
  textproc/docbook-xml-430
  textproc/docbook-xml-440
  textproc/docbook-xml-450
  x11-toolkits/fl_editor
  x11-toolkits/gtkunique