custom checkout fields

code.php

<?php

add_filter( 'woocommerce_checkout_fields' , 'lpb_override_checkout_fields', 20 );
function lpb_override_checkout_fields ( $fields ) {
	// remove o campo "sexo"
	unset( $fields['billing']['billing_sex'] );
	
	// remove obrigatoriedade do campo "data de nascimento"
	if ( isset( $fields['billing']['billing_birthdate'] ) ) {
		$fields['billing']['billing_birthdate']['required'] = false;
	}
	return $fields;
}