less-fields.php

<?php

add_filter('woocommerce_billing_fields','wpb_custom_billing_fields');
// remove some fields from billing form
// ref - https://docs.woothemes.com/document/tutorial-customising-checkout-fields-using-actions-and-filters/
function wpb_custom_billing_fields( $fields = array() ) {

	unset($fields['billing_company']);
	unset($fields['billing_address_1']);
	unset($fields['billing_address_2']);
	unset($fields['billing_state']);
	unset($fields['billing_city']);
	unset($fields['billing_phone']);
	unset($fields['billing_postcode']);
	unset($fields['billing_country']);

	return $fields;
}