Prune 15 obsolete ports

FreeBSD Ports maintainers have already deleted the following:
  databases/ruby-dbdbd
  deskutils/vboxgtk
  devel/geany-plugin-gdb
  devel/py-flakes
  dns/h2n
  emulators/vboxtool
  finance/tinyerp-server
  french/eficas_doc
  games/kye-data
  print/ghostscript7-jpnfont
  print/kdeutils4-printer-applet
  print/system-config-printer-kde
  science/py-biolccc
  security/sslproxy
  sysutils/facter