Remove content from pages dynamically filled in by a relevant layout

In fact, right now those pages content is duplicated - once included
here and once inserted by the doc-content (or hcl) layout.

user/reference/research.md

@@ -11,16 +11,3 @@ title: Research
 
 Here are links to various research papers, projects, and blog posts that relate
 to Qubes OS.
-
-{% for category in site.data.research.categories %}
-  <h3>{{category.name}}</h3>
-  <ul class="add-top more-bottom">
-  {% for paper in site.data.research.papers %}
-    {% if paper.category == category.slug %}
-    <li>
-      <a href="{{paper.url}}">{{paper.title}}</a> by {{paper.author}}{% if paper.date %}, {{paper.date}}{% endif %}
-    </li>
-    {% endif %}
-  {% endfor %}
-  </ul>
-{% endfor %}