Don't override Bootstraps default body font-size.

docs/_includes/head.html

@@ -20,8 +20,6 @@
 <link href="vendor/css/anchor.css" type="text/css" rel="stylesheet" />
 
 <style type="text/css">
-  body { font-size: 16px; }
-
   /* Footer */
   .s2-docs-footer {
     border-top: 1px solid #E5E5E5;