Remove jQuery from project path_locks:destroy action

ee/app/views/projects/path_locks/destroy.js.haml

 - unless @project.path_locks.any?
-  $('.locks').load(document.URL + ' .nothing-here-block').hide().fadeIn(1000)
+  var emptyState = document.querySelector('.locks .nothing-here-block.hidden');
+  if (emptyState) emptyState.classList.remove('hidden');

ee/app/views/projects/path_locks/index.html.haml

@@ -10,6 +10,6 @@
       = render @path_locks
 
     = paginate @path_locks, theme: 'gitlab'
-  - else
-    .nothing-here-block
-      = _("Repository has no locks.")
+
+  .nothing-here-block{ class: ('hidden' if @path_locks.any?) }
+    = _("Repository has no locks.")