gnome-keyring Removing GTK+2 support

[Stef Walter <stefw collabora co uk>]

As mentioned earlier [1], I'd like to remove support for GTK+2 from
gnome-keyring now that GTK+3 is available in some mainstream distros.

Here's a patch that does that:

https://bugzilla.gnome.org/show_bug.cgi?id=650144

Cheers,

Stef

[1]
http://mail.gnome.org/archives/gnome-keyring-list/2011-March/msg00001.html