Removing the Pidgin Theme Editor plugin

[Michael McConville]

On Tue, Jul 21, 2015 at 02:43:11PM -0700, Jorge Villaseñor wrote:
> I am not sure this themes works with Gtk+3.

Very true. I got the idea for removing this while doing GTK+ 3 updates.

> Also I think there are other external tools that would edit Gtk+3
> themes easily. If you can verify that is true.

I've been told this.

It's also worth noting that it has never saved the changes it makes,
which has led to some disgruntled ticket-openers.