Fix 1.0 Playground link; Remove Distiller link.

Author: BigBlueHat

playground/next/index.html

@@ -20,8 +20,7 @@ <h2 class="ui massive header">JSON-LD Playground</h2>
     </li>
     <li>
       Other related playgrounds:
-      <a href="./1.0/">Classic JSON-LD 1.0 Playground</a> |
-      <a href="http://rdf.greggkellogg.net/distiller">RDF Distiller</a> |
+      <a href="../1.0/">Classic JSON-LD 1.0 Playground</a> |
       <a href="https://vcplayground.org/">Verifiable Credentials Playground</a>
     </li>
   </ul>