Remove roadmap webpack bundle entry point

config/webpack.config.js

@@ -72,7 +72,6 @@ function generateEntries() {
     mirrors:              'ee/mirrors',
     ee_protected_branches: 'ee/protected_branches',
     service_desk:         'ee/projects/settings_service_desk/service_desk_bundle.js',
-    roadmap:              'ee/roadmap',
   };
 
   return Object.assign(manualEntries, autoEntries);

ee/app/assets/javascripts/pages/groups/roadmap/show/index.js

 import initNewEpic from 'ee/epics/new_epic/new_epic_bundle';
+import initRoadmap from 'ee/roadmap/index';
 
-document.addEventListener('DOMContentLoaded', initNewEpic);
+document.addEventListener('DOMContentLoaded', () => {
+  initNewEpic();
+  initRoadmap();
+});

ee/app/assets/javascripts/roadmap/index.js

@@ -13,7 +13,7 @@ import roadmapApp from './components/app.vue';
 
 Vue.use(Translate);
 
-document.addEventListener('DOMContentLoaded', () => {
+export default () => {
   const el = document.getElementById('js-roadmap');
 
   if (!el) {
@@ -57,4 +57,4 @@ document.addEventListener('DOMContentLoaded', () => {
       });
     },
   });
-});
+};

ee/app/views/groups/roadmap/show.html.haml

@@ -7,7 +7,6 @@
 - if @epics_count != 0
   - content_for :page_specific_javascripts do
     = webpack_bundle_tag 'common_vue'
-    = webpack_bundle_tag 'roadmap'
   #js-roadmap{ data: { epics_path: group_epics_path(@group, format: :json), group_id: @group.id, empty_state_illustration: image_path('illustrations/epics/roadmap.svg') } }
 - else
   = render 'shared/empty_states/roadmap'