remove MATE-1.8 Documentation

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackware-id.org>
libgnomecanvas: Added

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackware-id.org>
zenity: Added

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackware-id.org>