Remove duplicated viewport meta tag

_layouts/default.html

@@ -10,7 +10,6 @@
 
     <meta name="author" content="{{ site.name }}" />
     <meta name="description" content="{{ site.description }}">
-    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
 
     <!--[if lt IE 9]>
       <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
@@ -54,4 +53,4 @@
 
     {% include analytics.html %}
   </body>
-</html>
+</html>