diff --git a/_includes/head.html b/_includes/head.html
index 2a0e889..ae929a1 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -12,36 +12,19 @@
   {% endif %}
 
   <link rel="alternate" type="application/rss+xml" title="{{ site.title }} - {{ site.description }}" href="{{ site.baseurl }}/feed.xml" />
-  
- <!-- everything has to be repeated twice because on 2016-02-01 GitHub pages migrated to jekyll 3; see bug https://github.com/jekyll/jekyll/issues/4439 -->
 
-  {% if page.common-ext-css %}
-    {% for css in page.common-ext-css %}
-      <link rel="stylesheet" href="{{ css }}" />
-    {% endfor %}
-  {% endif %}  
   {% if layout.common-ext-css %}
     {% for css in layout.common-ext-css %}
       <link rel="stylesheet" href="{{ css }}" />
     {% endfor %}
   {% endif %}    
   
-  {% if page.common-css %}
-    {% for css in page.common-css %}
-      <link rel="stylesheet" href="{{ css | prepend: site.baseurl | replace: '//', '/' }}" />
-    {% endfor %}
-  {% endif %}
   {% if layout.common-css %}
     {% for css in layout.common-css %}
       <link rel="stylesheet" href="{{ css | prepend: site.baseurl | replace: '//', '/' }}" />
     {% endfor %}
   {% endif %}  
   
-  {% if page.common-googlefonts %}
-    {% for font in page.common-googlefonts %}
-      <link rel="stylesheet" href="//fonts.googleapis.com/css?family={{ font }}" />
-    {% endfor %}
-  {% endif %}
   {% if layout.common-googlefonts %}
     {% for font in layout.common-googlefonts %}
       <link rel="stylesheet" href="//fonts.googleapis.com/css?family={{ font }}" />
@@ -53,34 +36,19 @@
       <link rel="stylesheet" href="{{ css }}" />
     {% endfor %}
   {% endif %}  
-  {% if layout.ext-css %}
-    {% for css in layout.ext-css %}
-      <link rel="stylesheet" href="{{ css }}" />
-    {% endfor %}
-  {% endif %}  
   
   {% if page.css %}
     {% for css in page.css %}
       <link rel="stylesheet" href="{{ css | prepend: site.baseurl | replace: '//', '/' }}" />
     {% endfor %}
   {% endif %}
-  {% if layout.css %}
-    {% for css in layout.css %}
-      <link rel="stylesheet" href="{{ css | prepend: site.baseurl | replace: '//', '/' }}" />
-    {% endfor %}
-  {% endif %}
-  
+
   {% if page.googlefonts %}
     {% for font in page.googlefonts %}
       <link rel="stylesheet" href="//fonts.googleapis.com/css?family={{ font }}" />
     {% endfor %}
   {% endif %}
-  {% if layout.googlefonts %}
-    {% for font in layout.googlefonts %}
-      <link rel="stylesheet" href="//fonts.googleapis.com/css?family={{ font }}" />
-    {% endfor %}
-  {% endif %}   
-  
+
   <!-- Facebook OpenGraph tags -->
   <meta property="og:title" content="{% if page.title %}{{ page.title }}{% else %}{{ site.title }}{% endif %}" />
   <meta property="og:type" content="website" />