FIX: `guidFor` is not part of `Ember.Object`

FIX: guidFor is not part of Ember.Object

diff --git a/app/assets/javascripts/discourse-loader.js b/app/assets/javascripts/discourse-loader.js
index d11217a..fc829ae 100644
--- a/app/assets/javascripts/discourse-loader.js
+++ b/app/assets/javascripts/discourse-loader.js
@@ -36,7 +36,6 @@ var define, requirejs;
         default: Ember.Object,
         get: Ember.get,
         getProperties: Ember.getProperties,
-        guidFor: Ember.guidFor,
         set: Ember.set,
         setProperties: Ember.setProperties,
         computed: Ember.computed,
diff --git a/app/assets/javascripts/discourse/app/initializers/copy-codeblocks.js b/app/assets/javascripts/discourse/app/initializers/copy-codeblocks.js
index a0b0d50..f6fcef5 100644
--- a/app/assets/javascripts/discourse/app/initializers/copy-codeblocks.js
+++ b/app/assets/javascripts/discourse/app/initializers/copy-codeblocks.js
@@ -3,6 +3,7 @@ import { cancel, later } from "@ember/runloop";
 import { Promise } from "rsvp";
 import { iconHTML } from "discourse-common/lib/icon-library";
 import I18n from "I18n";
+import { guidFor } from "@ember/object/internals";
 
 // http://github.com/feross/clipboard-copy
 function clipboardCopy(text) {
@@ -90,7 +91,7 @@ export default {
             const state = button.innerHTML;
             button.innerHTML = I18n.t("copy_codeblock.copied");
 
-            const commandId = Ember.guidFor(button);
+            const commandId = guidFor(button);
 
             if (_fadeCopyCodeblocksRunners[commandId]) {
               cancel(_fadeCopyCodeblocksRunners[commandId]);
diff --git a/app/assets/javascripts/select-kit/app/components/select-kit.js b/app/assets/javascripts/select-kit/app/components/select-kit.js
index 140e967..02acfb5 100644
--- a/app/assets/javascripts/select-kit/app/components/select-kit.js
+++ b/app/assets/javascripts/select-kit/app/components/select-kit.js
@@ -1,5 +1,6 @@
 import I18n from "I18n";
-import EmberObject, { computed, get, guidFor } from "@ember/object";
+import EmberObject, { computed, get } from "@ember/object";
+import { guidFor } from "@ember/object/internals";
 import Component from "@ember/component";
 import deprecated from "discourse-common/lib/deprecated";
 import { makeArray } from "discourse-common/lib/helpers";

GitHub sha: 6c9c8dfe