Remove jQuery from admin labels:destroy action

app/views/admin/labels/destroy.js.haml

 - if @labels.size == 0
-  $('.labels').load(document.URL + ' .nothing-here-block').hide().fadeIn(1000)
+  var emptyState = document.querySelector('.labels .nothing-here-block.hidden');
+  if (emptyState) emptyState.classList.remove('hidden');

app/views/admin/labels/index.html.haml

@@ -13,5 +13,6 @@
       = render @labels
 
     = paginate @labels, theme: 'gitlab'
-  - else
-    .nothing-here-block= _('There are no labels yet')
+
+  .nothing-here-block{ class: ('hidden' if @labels.present?) }
+    = _('There are no labels yet')