fix #519: omit unnecessary css link

CHANGES.md

@@ -3,7 +3,8 @@ CHANGES
 
 ## 3.1.12-RC
 
-* 
+* Fix: Omit unnecessary css link
+    * Introduced by 3.1.10
 
 ## 3.1.11
 

lib/views/layout/layout.html

@@ -88,7 +88,6 @@ gh/highlightjs/cdn-release@9.12.0/build/languages/yaml.min.js
       <script src="{{ webpack_asset('styles/style.js') }}"></script>
       <script src="{{ webpack_asset('styles/theme-' + theme() + '.js') }}"></script>
     {% else %}
-      <link rel="stylesheet" href="{{ webpack_asset('js/vendors.css') }}">
       <link rel="stylesheet" href="{{ webpack_asset('styles/style.css') }}">
       <link rel="stylesheet" href="{{ webpack_asset('styles/theme-' + theme() + '.css') }}">
     {% endif %}