grim/pidgin

Remove the prototype for pidgin_dialogs_log which was missed when the logging api was removed

Testing Done:
Compiled

Reviewed at https://reviews.imfreedom.org/r/1109/
i18n = import('i18n')
i18n.gettext('pidgin',
args : '--from-code=utf-8',
install : get_option('nls'),
)