Remove the separation logic course link in the research description block in the home page.

_layouts/home.html

@@ -5,9 +5,12 @@ layout: default
   <div class="lead">
     {{ content }}
   </div>
-  {% assign research_pages = site.pages | where_exp: 'page', 'page.url contains "/research/"' %}
+  {% assign research_pages = site.pages | where_exp: 'page', 'page.url contains "/research/"'%}
   {% for item in research_pages reversed %}
+  {% if item.url contains "separationlogic" %}
+  {% else %}
   <a class="btn btn-primary btn-lg" href="{{ item.url }}">{{ item.title }}</a>
+  {% endif %}
   {% endfor %}
 </div>