Ansible FortiOS, how to remove interface from virtual hardware switch?

Hello,

I have a 40F.

Default config has a virtual hardware switch called "lan" whose member interfaces are: "lan1", "lan2" and "lan3".

I would like to remove those member interfaces from the "lan" switch using Ansible.

Do you know how to do that ?

https://docs.ansible.com/ansible/latest/collections/fortinet/fortios/fortios_system_virtual_switch_module.html#examples

I tried the tasks bellow, leaving the port empty, but no success.
If I specify just one port, like lan1, it removes the others. I need to remove them all.

task1
- name: Remove member interfaces from "lan" virtual hardware switch
  fortinet.fortios.fortios_system_virtual_switch:
    vdom: "{{ vdom }}"
    state: "present"
    system_virtual_switch:
        name: "lan"
        port:

task2
- name: Remove member interfaces from "lan" virtual hardware switch
  fortinet.fortios.fortios_system_virtual_switch:
    vdom: "{{ vdom }}"
    state: "present"
    system_virtual_switch:
        name: "lan"
        port:
            -