docs: fix broken documentation page

Author: cezary.maszczyk

docs/serve/index.html

@@ -114,12 +114,6 @@ <h1>
                 >
               </li>
 
-                <li class="toctree-l1">
-                    <a class="reference internal" href="v2.1.18.0/index.html">
-                        v2.1.18.0 
-                    </a>
-                </li>
-                
                 <li class="toctree-l1">
                     <a class="reference internal" href="v2.1.18.0/index.html">
                         v2.1.18.0 (latest)