Remove bottom 3 links in TOC (#660)

Author: bmunkholm

src/crate/theme/rtd/crate/sidebartoc.html

@@ -150,9 +150,6 @@
   <!-- Section D. -->
   <li class="navleft-item border-top"><a target="_blank" href="/support/">Support</a></li>
   <li class="navleft-item"><a target="_blank" href="https://community.cratedb.com/">Community</a></li>
-  <li class="navleft-item"><a target="_blank" href="https://community.cratedb.com/t/overview-of-cratedb-integration-tutorials/1015">Integration Tutorials</a></li>
-  <li class="navleft-item"><a href="/docs/guide/start/application/index.html">Sample Applications</a></li>
-  <li class="navleft-item"><a target="_blank" href="https://learn.cratedb.com">Academy</a></li>
 
   <!-- Section E. -->
   {% if project == 'CrateDB documentation theme' %}