Woocommerce remove Postal Code on billing page

// Remove Zip Postal code if Woocommerce plugin activated if ( in_array( 'woocommerce/woocommerce.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) { add_filter( 'woocommerce_checkout_fields', 'osv_remove_postcode_billing' ); function osv_remove_postcode_billing( $fields ) { unset($fields['billing']['billing_postcode']); return $fields; } }