I have made a custom post type for a child theme. I removed "thumbnail" from the supports array in functions.php and that prevents a featured image meta box from being displayed. However, when in the "add an image" modal dialogue thing, there is still a "Use as featured image" link. Why, oh why? More to the point, does anyone know how to remove?
remove_post_type_support( 'itinerary', 'post-thumbnail' );
...where itinerary is the name of my custom post type. Any help would be greatly appreciated!