Removing Product from Woocommerce checkout page using Ajax

Use jQuery('body').trigger('update_checkout'); on your javascript e.g on ajax success/response it will update checkout page with ajax.

$.ajax({
    type: 'POST',
    dataType: 'json',
    url: wc_checkout_params.ajax_url,
    data: {
        action: "product_remove",
        product_id: product_id,
        cart_item_key: cart_item_key
    },
    success: function(response) {
        if ( ! response || response.error )
            return;

        var fragments = response.fragments;

        // Replace fragments
        if ( fragments ) {
            $.each( fragments, function( key, value ) {
                $( key ).replaceWith( value );
            });
        }
        jQuery('body').trigger('update_checkout');
    }
});