function custom_wcbcf_billing_fields( $fields ) {
	global $woocommerce;
	if ($woocommerce->customer->get_country() != 'BR') {
		$fields['billing_state']['required'] = false;
		$fields['billing_cpf']['required'] = false;
		$fields['billing_cpf']['class'] = array('esconde-meu-div');
	}
 	return $fields;
}

add_filter( 'wcbcf_billing_fields', 'custom_wcbcf_billing_fields' );