Fix problem with {% link reference.md %}

Author: rgaiacs

_includes/navbar.html

@@ -54,7 +54,7 @@
 	{% endif %}
 
 	{% comment %} Show extras for lessons or if this is the main workshop-template repo (where they contain documentation). {% endcomment %}
-	{% if site.kind == "lesson" or site.github.repository_name == "workshop-template" %}
+	{% if site.kind == "lesson" %}
         <li class="dropdown">
           <a href="{{ page.root }}/" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Extras <span class="caret"></span></a>
           <ul class="dropdown-menu">