Update callback

Author: adamsilverstein

src/wp-includes/default-filters.php

@@ -522,7 +522,7 @@
 // Email notifications.
 add_action( 'comment_post', 'wp_new_comment_notify_moderator' );
 add_action( 'comment_post', 'wp_new_comment_notify_postauthor' );
-add_action( 'rest_insert_comment', array( 'WP_REST_Comments_Controller', 'wp_new_comment_via_rest_notify_postauthor' ) );
+add_action( 'rest_insert_comment', 'wp_new_comment_via_rest_notify_postauthor' );
 add_action( 'after_password_reset', 'wp_password_change_notification' );
 add_action( 'register_new_user', 'wp_send_new_user_notifications' );
 add_action( 'edit_user_created_user', 'wp_send_new_user_notifications', 10, 2 );