Removing "set as featured image" in media upload

I’m writing a small plugin to open a reduced “media-upload.php” (using “attachment_fields_to_edit”) and attach a new media to a post.

I can’t find a way to hide the “set as featured image” button link, while I can hide “insert into post” using “get_media_item_args” hook.

I’m looking for a hook solution and not a javascript/css way of course.

Thanks