How to remove “featured image” functionality from a custom post type?

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?

I tried…

remove_post_type_support( ‘itinerary’, ‘post-thumbnail’ );

…where itinerary is the name of my custom post type. Any help would be greatly appreciated!

Steve

Some where in your theme you should have:

add_theme_support( 'post-thumbnails' );

Instead of removing support for a post type try only adding support for the post types you want:

add_theme_support( 'post-thumbnails', array( 'post', 'movie' ) );