How to remove delivery shipping step on prestashop 1.7?

On prestashop 1.7.* I managed to disable (make disappear) the whole delivery step. In my scenario, the business model for my customer is Cash on delivery.

To achieve that I commented it out in the source code.

in the file

controllers/front/OrderController.php
comment out checkoutDeliveryStep

Simply comment out the following lines

->addStep(new CheckoutAddressesStep(
            $this->context,
            $translator,
            $this->makeAddressForm()
        ));

in /controllers/front/OrderController.php