Revert "more accurate attribution in sidebar bottom"

Did not work as guessed from http://www.rubydoc.info/gems/jekyll-github-metadata/2.9.4/Jekyll/GitHubMetadata/Repository#project_page%3F-instance_method

Signed-off-by: Joke Pol <joke.pol@dans.knaw.nl>

docs/_layouts/default.html

@@ -57,22 +57,10 @@ <h2>{{ site.description | default: site.github.project_tagline }}</h2>
             {% endif %}
 
             {% if site.github.is_project_page %}
-            <p class="repo-owner"><a href="{{ site.github.repository_url }}">{{ site.github.repository_name }}</a>
-                is
-                {% if site.github.is_primary %}
-                    maintained
-                {% else %}
-                    forked
-                {% endif %}
-                by
-                {% if site.github.is_organisation_repository %}
-                    organisation
-                {% endif %}
-                <a href="{{ site.github.owner_url }}">{{ site.github.owner_name }}</a>
-            </p>
+            <p class="repo-owner"><a href="{{ site.github.repository_url }}">{{ site.github.repository_name }}</a> is maintained by <a href="{{ site.github.owner_url }}">{{ site.github.owner_name }}</a>.</p>
             {% endif %}
 
-            <p>Hosted on <a href="https://pages.github.com">GitHub Pages</a>.</p>
+            <p>This page was generated by <a href="https://pages.github.com">GitHub Pages</a>.</p>
         </aside>
     </div>
 </div>