Reverting work on DemoBot (it is now an external package).

server/lib/settings.ts

@@ -359,22 +359,6 @@ archiving for a specific room, by editing its properties.
 </ul>`
   })
 
-  registerSetting({
-    name: 'prosody-component-port',
-    label: 'The port to be use for external components',
-    type: 'input',
-    default: '53470',
-    private: true,
-    descriptionHTML:
-`The port that will be used for extra components used by the builtin Prosody server.<br>
-This is only used when one of these special features is used:<br>
-<ul>
-  <li>Demo bot: this is a hidden feature, for demonstration purposes. See the documentation for more information.</li>
-</ul><br>
-Change it if this port is already in use on your server.
-`
-  })
-
   registerSetting({
     name: 'prosody-c2s',
     label: 'Enable client to server connections',