Remove expired ports:

2021-04-01 multimedia/transcode: Unmaintained and dead upstream, does not build with -fno-common (llvm 11)
2021-02-28 x11-toolkits/p5-Gnome2-VFS: Deprecated by the Gtk-Perl project. No more security patches and bug fixes
2021-02-28 x11-toolkits/p5-Gnome2: Deprecated by the Gtk-Perl project. No more security patches and bug fixes
2021-05-01 multimedia/dvdrip: Depends on expired multimedia/transcode
2021-05-01 multimedia/subtitleripper: Depends on expired multimedia/transcode
2021-05-01 multimedia/mkxvcd: Depends on expired multimedia/transcode
2021-05-01 deskutils/shutter: Upstream gone, depends on expired x11-toolkits/p5-Gnome2-VFS
2021-05-01 misc/gcstar: Depends on expired x11-toolkits/p5-Gnome2-VFS