Prune 29 obsolete ports

FreeBSD Ports maintainers have already deleted the following:
  databases/mylibrary
  databases/phpmyadmin35
  databases/py-migrate
  deskutils/mywiki
  deskutils/toolbox
  devel/avr-gcc-3
  devel/bugzilla3
  devel/g2c
  devel/libgiigic
  devel/py-astng
  editors/codeeditor
  games/koth
  german/bugzilla3
  graphics/libggigcp
  graphics/libggimisc
  graphics/libggiwmh
  japanese/bugzilla3
  japanese/dvi2dvi
  japanese/texfamily
  japanese/texfamily-vfn2a
  math/libmath++
  net-im/licq-console
  net/netclasses
  russian/bugzilla3
  security/openvpn22
  x11-toolkits/gnustep-art
  x11-toolkits/gnustep-cairo
  x11-toolkits/gtoolkit
  x11-toolkits/renaissance