Remove firebug comments

Firebug is discontinued and it's features are included in browser
development tools now a days.

vnc_lite.html

@@ -55,11 +55,6 @@
     <!-- Stylesheets -->
     <link rel="stylesheet" href="app/styles/lite.css">
 
-     <!--
-    <script type='text/javascript'
-        src='http://getfirebug.com/releases/lite/1.2/firebug-lite-compressed.js'></script>
-    -->
-
     <!-- promise polyfills promises for IE11 -->
     <script src="vendor/promise.js"></script>
     <!-- ES2015/ES6 modules polyfill -->