Updated docs favicon

docs/book/template.html.mustache

@@ -19,13 +19,8 @@
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="theme-color" content="#ffffff"/>
 
-  {{&favicon_escaped}}
-  {{#favicon_svg}}
-    <link rel="icon" href="{{ path_to_root }}assets/favicon.svg">
-  {{/favicon_svg}}
-  {{#favicon_png}}
-    <link rel="shortcut icon" href="{{ path_to_root }}assets/favicon.png">
-  {{/favicon_png}}
+  <link rel="icon" href="{{ path_to_root }}assets/favicon.png">
+  
   <link rel="stylesheet" href="{{ path_to_root }}assets/css/variables.css">
   <link rel="stylesheet" href="{{ path_to_root }}assets/css/general.css">
   <link rel="stylesheet" href="{{ path_to_root }}assets/css/chrome.css">