pidgin/pidgin

Remove the TURN stuff as it didn't do much and is going to move to Traversity

Testing Done:
Compiled and verified the network preferences page still functioned properly.

Reviewed at https://reviews.imfreedom.org/r/2160/
i18n = import('i18n')
# use the glib preset which is defined at
# https://github.com/mesonbuild/meson/blob/master/mesonbuild/modules/i18n.py#L93
# at the time of this comment.
i18n.gettext('pidgin', preset : 'glib')