message: Add messenger profile account linking
diff: @@ -469,7 +469,6 @@ function Facebookbot(configuration) {
  },
  account_linking: function (payload) {
  var message = {
  - 'setting_type': 'account_linking',
  'account_linking_url': payload
  };
  facebook_botkit.api.messenger_profile.postAPI(message);
  