doc: update index.html to remove unused endpoint as well as add nodeScheduler to it

public/index.html

@@ -24,6 +24,7 @@
       <ul>
         <li>No need to use CORS proxy or API key</li>
         <li>Only GET requests are allowed</li>
+        <li>No need to fetch the data by typing different endpoints, instead, nodeScheduler will do it.</li>
       </ul>
 
       <section class="divider"></section>
@@ -58,15 +59,10 @@
           <td>Yes</td>
           <td>Fetches World Data from Wapi endpoint</td>
         </tr>
-        <tr>
-          <td>/api/travel</td>
-          <td>No</td>
-          <td>Fetches Travel city from Juhe. <strong>You only need to run it once. The data will remain the same</strong></td>
-        </tr>
       </table>
       <p>
         Example URL: <code>https://covid-19-api-server.herokuapp.com/api</code>
       </p>
     </section>
   </body>
-</html>
+</html>