After deleting one of the checkout steps, shipping methods disappeared |||?

Question

JavaScript

The problem is this: I removed step No. 3 (Delivery address) when placing an order so that it does not happen again. Here you can see how the method works.
However, I recently discovered a big bug. As I found out, due to the absence of step number 3, information about the place for the delivery of goods is not transmitted to the database, which in turn leads to the absence of delivery methods.
Site loveyou.ua
Created a demo account so you can see( The problem is only when you log in ): [email protected] 12345

Here is the code that is used:

// Payment Address
$(document).delegate('#button-payment-address', 'click', function() {
    $.ajax({
        url: 'index.php?route=checkout/payment_address/save',
        type: 'post',
        data: $('#collapse-payment-address input[type=\'text\'], #collapse-payment-address input[type=\'date\'], #collapse-payment-address input[type=\'datetime-local\'], #collapse-payment-address input[type=\'time\'], #collapse-payment-address input[type=\'password\'], #collapse-payment-address input[type=\'checkbox\']:checked, #collapse-payment-address input[type=\'radio\']:checked, #collapse-payment-address input[type=\'hidden\'], #collapse-payment-address textarea, #collapse-payment-address select'),
        dataType: 'json',
        beforeSend: function() {
        	$('#button-payment-address').button('loading');
    },
        complete: function() {
      $('#button-payment-address').button('reset');
        },
        success: function(json) {
            $('.alert, .text-danger').remove();

            if (json['redirect']) {
                location = json['redirect'];
            } else if (json['error']) {
                if (json['error']['warning']) {
                    $('#collapse-payment-address .panel-body').prepend('<div class="alert alert-warning">' + json['error']['warning'] + '<button type="button" class="close" data-dismiss="alert">&times;</button></div>');
                }

        for (i in json['error']) {
          var element = $('#input-payment-' + i.replace('_', '-'));

          if ($(element).parent().hasClass('input-group')) {
            $(element).parent().after('<div class="text-danger">' + json['error'][i] + '</div>');
          } else {
            $(element).after('<div class="text-danger">' + json['error'][i] + '</div>');
          }
        }

        // Highlight any found errors
        $('.text-danger').parent().parent().addClass('has-error');
            } else {
                 	 <?php if ($shipping_required) { ?>
               $.ajax({
                    url: 'index.php?route=checkout/shipping_method',
                    dataType: 'html',
                    complete: function() {
                        $('#button-shipping-address').button('reset');
                    },
                    success: function(html) {
                        $('#collapse-shipping-method .panel-body').html(html);

            $('#collapse-shipping-method').parent().find('.panel-heading .panel-title').html('<a href="#collapse-shipping-method" data-toggle="collapse" data-parent="#accordion" class="accordion-toggle"><?php echo $text_checkout_shipping_method; ?> <i class="fa fa-caret-down"></i></a>');

            $('a[href=\'#collapse-shipping-method\']').trigger('click');

            $('#collapse-payment-method').parent().find('.panel-heading .panel-title').html('<?php echo $text_checkout_payment_method; ?>');
            $('#collapse-checkout-confirm').parent().find('.panel-heading .panel-title').html('<?php echo $text_checkout_confirm; ?>');
                },
                error: function(xhr, ajaxOptions, thrownError) {
                    alert(thrownError + "\r\n" + xhr.statusText + "\r\n" + xhr.responseText);
                }
            });
            <?php }else { ?>
                $.ajax({
                    url: 'index.php?route=checkout/payment_method',
                    dataType: 'html',
                    success: function(html) {
                        $('#collapse-payment-method .panel-body').html(html);

            $('#collapse-payment-method').parent().find('.panel-heading .panel-title').html('<a href="#collapse-payment-method" data-toggle="collapse" data-parent="#accordion" class="accordion-toggle"><?php echo $text_checkout_payment_method; ?> <i class="fa fa-caret-down"></i></a>');

            $('a[href=\'#collapse-payment-method\']').trigger('click');

            $('#collapse-checkout-confirm').parent().find('.panel-heading .panel-title').html('<?php echo $text_checkout_confirm; ?>');
                    },
                    error: function(xhr, ajaxOptions, thrownError) {
                        alert(thrownError + "\r\n" + xhr.statusText + "\r\n" + xhr.responseText);
                    }
                });
                <?php } ?>

                $.ajax({
                    url: 'index.php?route=checkout/payment_address',
                    dataType: 'html',
                    success: function(html) {
                        $('#collapse-payment-address .panel-body').html(html);
                    },
                    error: function(xhr, ajaxOptions, thrownError) {
                        alert(thrownError + "\r\n" + xhr.statusText + "\r\n" + xhr.responseText);
                    }
                });
            }
        },
        error: function(xhr, ajaxOptions, thrownError) {
            alert(thrownError + "\r\n" + xhr.statusText + "\r\n" + xhr.responseText);
        }
    });
});