Remove unneeded and possibly puzzeling documentation

docs/configuring-playbook-bot-maubot.md

@@ -61,23 +61,3 @@ You can expand "Access token" to copy it.
 ![Obatining an admin access token with Element](assets/obtain_admin_access_token_element.png)
 
 **IMPORTANT**: once you copy the token, just close the Matrix client window/tab. Do not "log out", as that would invalidate the token.
-
-## External nginx
-
-To use the management interface with an [external nginx webserver](configuring-playbook-own-webserver.md) the configuration will default to
-a http bind port at `127.0.0.1:29316`. If you need to use a different interface add the following to your `vars.yml` (e.g. with `0.0.0.0`).
-
-
-```yaml
-# Controls whether the maubot container exposes its HTTP management interface port (tcp/29316 in the container).
-#
-# Takes an "<ip>:<port>" or "<port>" value (e.g. "127.0.0.1:29316"), or empty string to not expose.
-# If you'll be setting this at all, it should be defined in terms of `matrix_bot_maubot_management_interface_port`.
-# Example:
-# matrix_bot_maubot_management_interface_http_bind_port: "127.0.0.1:{{ matrix_bot_maubot_management_interface_port }}"
-matrix_bot_maubot_management_interface_http_bind_port: '0.0.0.0:{{ matrix_bot_maubot_management_interface_port }}'
-```
-
-
-
-