message: Refactor delet from api
diff: @@ -430,12 +430,7 @@ function Facebookbot(configuration) {
  facebook_botkit.api.messenger_profile.postAPI(message);
  },
  delete_greeting: function () {
  - var message = {
  - "fields": [
  - "greeting"
  - ]
  - };
  - facebook_botkit.api.messenger_profile.deleteAPI(message);
  + facebook_botkit.api.messenger_profile.deleteAPI('greeting');
  },
  get_started: function (payload) {
  var message = {
  @@ -446,12 +441,7 @@ function Facebookbot(configuration) {
  facebook_botkit.api.messenger_profile.postAPI(message);
  },
  delete_get_started: function () {
  - var message = {
  - "fields": [
  - "get_started"
  - ]
  - };
  - facebook_botkit.api.messenger_profile.deleteAPI(message);
  + facebook_botkit.api.messenger_profile.deleteAPI('get_started');
  },
  menu: function (payload) {
  var messege = {
  @@ -460,12 +450,7 @@ function Facebookbot(configuration) {
  facebook_botkit.api.messenger_profile.postAPI(messege);
  },
  delete_menu: function () {
  - var message = {
  - "fields": [
  - "persistent_menu"
  - ]
  - };
  - facebook_botkit.api.messenger_profile.deleteAPI(message);
  + facebook_botkit.api.messenger_profile.deleteAPI('persistent_menu');
  },
  account_linking: function (payload) {
  var message = {
  @@ -474,12 +459,7 @@ function Facebookbot(configuration) {
  facebook_botkit.api.messenger_profile.postAPI(message);
  },
  delete_account_linking: function () {
  - var message = {
  - "fields": [
  - "account_linking_url"
  - ]
  - };
  - facebook_botkit.api.messenger_profile.deleteAPI(message);
  + facebook_botkit.api.messenger_profile.deleteAPI('account_linking_url');
  },
  postAPI: function (message) {
  request.post('https://graph.facebook.com/v2.6/me/messenger_profile?access_token=' + configuration.access_token,
  @@ -507,7 +487,10 @@ function Facebookbot(configuration) {
  }
  });
  },
  - deleteAPI: function (message) {
  + deleteAPI: function (type) {
  + var message = {
  + "fields": [type]
  + };
  request.delete('https://graph.facebook.com/v2.6/me/messenger_profile?access_token=' + configuration.access_token,
  {form: message},
  function (err, res, body) {
  