fix issue

templates/repo/datasets/index.tmpl

@@ -119,15 +119,6 @@
     max-width: 400px;
   }
 </style>
-<div id="mask">
-  <div id="loadingPage">
-    <div class="rect1"></div>
-    <div class="rect2"></div>
-    <div class="rect3"></div>
-    <div class="rect4"></div>
-    <div class="rect5"></div>
-  </div>
-</div>
 <div class="repository">
   {{template "repo/header" .}}
   {{if .dataset}}