DEV: Remove use of run-loop-and-computed-dot-access (#57)

Context: https://deprecations.emberjs.com/v3.x/#toc_deprecated-run-loop-and-computed-dot-access

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

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