pidgin/pidgin

Remove GTK plugin prefs

14 months ago, Elliott Sales de Andrade
a8bad57aa8c3
Remove GTK plugin prefs

They are unused now that Pidgin uses GPlugin plugin settings.

Testing Done:
Compiled only.

Reviewed at https://reviews.imfreedom.org/r/2397/
libpurple/data/purple-url-handler.desktop.in
libpurple/protocols/null/nullprpl.c
pidgin/data/im.pidgin.Pidgin.desktop.in