Prune 51 obsolete ports

FreeBSD Ports maintainers have already deleted the following:
  audio/ruby-freedb
  audio/ruby-mp3info
  comms/callsign
  databases/freetds-msdblib
  databases/ruby-dbd_mysql
  databases/ruby-dbd_odbc
  databases/ruby-dbd_pg
  databases/ruby-dbd_sqlite
  databases/ruby-dbd_sqlite3
  databases/ruby-dbi
  devel/cocaine-core
  devel/libgii
  devel/ri-emacs
  devel/ruby-fastri
  devel/ruby-locale2
  devel/ruby-multi
  devel/rubygem-echoe
  devel/rubygem-rubyforge
  games/gnomechess
  graphics/libggi
  graphics/ruby-ming
  japanese/ruby-ming
  math/ruby-fftw3
  math/ruby-gnuplot
  math/ruby-gsl
  math/ruby-narray
  math/ruby-narray_miss
  math/ruby-numru_misc
  misc/ruby-vpim
  multimedia/podcatcher
  multimedia/ruby-flvtool2
  multimedia/vodcatcher
  net/ruby-growl
  net/ruby-ldap
  science/ruby-netcdf
  security/ruby-crypt
  security/ruby-gpgme
  sysutils/moreutils-parallel
  sysutils/philesight
  sysutils/rubygem-chef-expander
  sysutils/rubygem-chef-solr
  textproc/ruby-amatch
  textproc/ruby-liquid
  www/mediawiki121
  www/ruby-borges
  www/ruby-fcgi
  www/ruby-fcgiwrap
  www/rubygem-chef-server-webui
  www/rubygem-scrubyt
  www/squid32
  x11-toolkits/ruby-fox16