Menus: Remove caching todo from wp_nav_menu_item_post_type_meta_box().

Remove the note to introduce caching to `wp_nav_menu_item_post_type_meta_box()` as caching has since been introduced to `WP_Query` and therefore `get_posts()`. The comment is out of date.

See #63168.


git-svn-id: https://develop.svn.wordpress.org/trunk@60980 602fd350-edb4-49c9-b593-d223f7449a82

Author: peterwilsoncc

src/wp-admin/includes/nav-menu.php

@@ -495,7 +495,6 @@ function wp_nav_menu_item_post_type_meta_box( $data_object, $box ) {
 		}
 	}
 
-	// @todo Transient caching of these results with proper invalidation on updating of a post of this type.
 	$get_posts = new WP_Query();
 	$posts     = $get_posts->query( $args );