Prune 42 obsolete ports

FreeBSD Ports maintainers have already deleted the following:
  deskutils/gdesklets
  deskutils/gdesklets-recentlyused
  deskutils/gdesklets-starterbar
  deskutils/global-menu
  deskutils/labyrinth
  deskutils/libopensync-plugin-evolution2
  deskutils/libopensync-plugin-evolution2-devel
  devel/bug-buddy
  devel/gnome2-hacker-tools
  editors/gnome2-office
  games/gnomesudoku
  lang/vala-vapigen
  mail/evolution-exchange
  mail/gmail-notify
  math/gcalctool
  misc/gnome2-reference
  misc/xmonad-log-applet
  net/gnome-netstatus
  security/pinentry-gtk
  security/seahorse-plugins
  sysutils/cfengine36-rc
  sysutils/tracker-client
  sysutils/tracker-gnome
  sysutils/tracker-libtrackergtk
  www/epiphany-extensions
  www/evolution-webcal
  x11-clocks/gdesklets-clock
  x11-clocks/gdesklets-countdown
  x11-clocks/gdesklets-ebichuclock
  x11-toolkits/libpanelappletmm
  x11-toolkits/py-gnome-desktop
  x11-toolkits/py-gnome-extras
  x11/gdesklets-tasklist
  x11/gnome-panel
  x11/gnome-panel-reference
  x11/gnome-pie
  x11/gnome-screensaver
  x11/gnome-swallow
  x11/gnome2
  x11/gnome2-fifth-toe
  x11/gnome2-lite
  x11/xfce4-xfapplet-plugin