Remove author and link

I get way too many emails/tweets from people thinking I own the project.

_layouts/default.html

@@ -28,7 +28,7 @@ <h2 class="project-tagline">{{ site.description | default: site.github.project_t
         {% if site.github.is_project_page %}
           <span class="site-footer-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>.</span>
         {% endif %}
-        <span class="site-footer-credits">This page was generated by <a href="https://pages.github.com">GitHub Pages</a> using the <a href="https://github.com/jasonlong/cayman-theme">Cayman theme</a> by <a href="https://twitter.com/jasonlong">Jason Long</a>.</span>
+        <span class="site-footer-credits">This page was generated by <a href="https://pages.github.com">GitHub Pages</a>.</span>
       </footer>
     </section>