DEV: remove global Ember usage.

Remove Ember from lint globals, along with jquery globals

.eslintrc

@@ -12,7 +12,6 @@
     "sourceType": "module"
   },
   "globals": {
-    "$": true,
     "_": true,
     "andThen": true,
     "asyncRender": true,
@@ -27,7 +26,6 @@
     "currentURL": true,
     "define": true,
     "Discourse": true,
-    "Ember": true,
     "exists": true,
     "File": true,
     "fillIn": true,
@@ -36,7 +34,6 @@
     "hasModule": true,
     "I18n": true,
     "invisible": true,
-    "jQuery": true,
     "keyboardHelper": true,
     "keyEvent": true,
     "moduleFor": true,

assets/javascripts/discourse/components/show-user-notes.js.es6

@@ -1,5 +1,8 @@
-export default Ember.Component.extend({
+import Component from "@ember/component";
+import { computed } from "@ember/object";
+
+export default Component.extend({
   tagName: "",
 
-  showCount: Ember.computed.gt("count", 0)
+  showCount: computed.gt("count", 0)
 });