remove remnant comment about "contextual notice" (now gone):

- intending to use Gutenberg notice and/or proposed forthcoming InlineNotice variant

plugins/woocommerce/includes/admin/meta-boxes/class-wc-meta-box-order-data.php

@@ -260,9 +260,6 @@ class WC_Meta_Box_Order_Data {
 					 * the order page. Example: display a notice if
 					 * the order is disputed.
 					 *
-					 * WC_Admin_Notices::render_contextual_notice() can be
-					 * used to render a prominent notice with a CTA button.
-					 *
 					 * @param $order WC_Order The order object being displayed.
 					 * @since 7.9.0
 					 */