pidgin/pidgin

Remove the remaining nat-pmp code for auto discovering ip addresses

Testing Done:
Compiled

Reviewed at https://reviews.imfreedom.org/r/2161/
PURPLE_HISTORY_SOURCES = [
'purplehistorycore.c',
]
purple_history = executable('purple-history',
PURPLE_HISTORY_SOURCES,
dependencies : [libpurple_dep, glib],
install : true,
override_options : ['c_std=c99', 'warning_level=2'])