Move EE differences for `app/assets/javascripts/boards/components/board_sidebar.js`

The file app/assets/javascripts/boards/components/board_sidebar.js has differences between CE and EE.

Diferences

diff --git a/home/yorickpeterse/Projects/gitlab/gdk-ce/gitlab/app/assets/javascripts/boards/components/board_sidebar.js b/home/yorickpeterse/Projects/gitlab/gdk-ee/gitlab/app/assets/javascripts/boards/components/board_sidebar.js
index e637e1f1223..f02de68df7d 100644
--- a/home/yorickpeterse/Projects/gitlab/gdk-ce/gitlab/app/assets/javascripts/boards/components/board_sidebar.js
+++ b/home/yorickpeterse/Projects/gitlab/gdk-ee/gitlab/app/assets/javascripts/boards/components/board_sidebar.js
@@ -2,6 +2,7 @@
 
 import $ from 'jquery';
 import Vue from 'vue';
+import Weight from 'ee/sidebar/components/weight/weight.vue';
 import Flash from '../../flash';
 import { sprintf, __ } from '../../locale';
 import Sidebar from '../../right_sidebar';
@@ -22,6 +23,7 @@ export default Vue.extend({
     Assignees,
     RemoveBtn,
     Subscriptions,
+    Weight,
   },
   props: {
     currentUser: {

What needs to be done

1. Use async import to load the component