remove webpack bundle tag for monitoring:environments:metrics

app/assets/javascripts/dispatcher.js

@@ -68,6 +68,11 @@ import SearchAutocomplete from './search_autocomplete';
             .catch(fail);
           shortcut_handler = true;
           break;
+        case 'projects:environments:metrics':
+          import('./pages/projects/environments/metrics')
+            .then(callDefault)
+            .catch(fail);
+          break;
         case 'projects:merge_requests:index':
           import('./pages/projects/merge_requests/index')
             .then(callDefault)

app/assets/javascripts/monitoring/monitoring_bundle.js

 import Vue from 'vue';
 import Dashboard from './components/dashboard.vue';
-document.addEventListener('DOMContentLoaded', () => new Vue({
+export default () => new Vue({
   el: '#prometheus-graphs',
   render: createElement => createElement(Dashboard),
-}));
+});

app/assets/javascripts/pages/projects/environments/metrics/index.js

+import monitoringBundle from '~/monitoring/monitoring_bundle';
+
+export default monitoringBundle;

app/views/projects/environments/metrics.html.haml

@@ -3,7 +3,6 @@
 - content_for :page_specific_javascripts do
   = webpack_bundle_tag 'common_vue'
   = webpack_bundle_tag 'common_d3'
-  = webpack_bundle_tag 'monitoring'
 .prometheus-container{ class: container_class }
   .top-area