Prune 16 obsolete ports

FreeBSD Ports maintainers have already deleted the following:
  astro/celestia-kde
  comms/libticables
  comms/qfaxreader
  comms/tqsllib
  devel/libtifiles
  devel/py-reddit
  games/gnomememoryblocks
  games/speakinghangman
  net/openldap23-client
  net/openldap23-sasl-client
  security/pinentry-qt
  textproc/romdict
  www/dillo
  www/dillo-i18n
  www/py-django13
  www/siteatschool