Clean out all sub-pages since chapters/events seem to be inactive

Author: finnp

about.html

@@ -8,15 +8,8 @@
       <li><a href="https://twitter.com/nodeschool" target="_blank" rel="noreferrer noopener">t/@nodeschool</a></li>
       <li><a href="https://github.com/nodeschool" target="_blank" rel="noreferrer noopener">gh/nodeschool</a></li>
     </ul>
-    <ul>
-      <li><strong data-i18n="footer-contribute-header">Contribute</strong></li>
-      <li><a href="https://github.com/nodeschool/discussions/issues/new" target="_blank" rel="noreferrer noopener" data-i18n="footer-contribute-question">Open an Issue</a></li>
-      <li><a href="https://github.com/nodeschool/discussions/issues" target="_blank" rel="noreferrer noopener" data-i18n="footer-contribute-answer">Answer a Question</a></li>
-    </ul>
     <ul>
       <li><strong data-i18n="footer-about-header">About</strong></li>
-      <li><a href="building-workshops.html" data-i18n="footer-about-build">Build a workshopper</a></li>
-      <li><a href="host.html" data-i18n="footer-about-host">Host a workshop</a></li>
       <li><a href="https://github.com/nodeschool/nodeschool.github.io/blob/source/LICENSE" data-i18n="footer-about-license">Website license</a></li>
     </ul>
  </div>