I use the following code to remove delete and publish buttons. How do I remove the "Delete from draft site" button?

<?php

class GlobalContent extends SiteTree {

	function canDelete(){
		return false;
	}
	function canPublish(){
		return false;
	}
}

?>

I would also like to know this. I have setup some pages as Page Folders, that are not published, but have pages inside (or one level nav down) that will be published.

These main unpublished folder type pages need to be unpublished, but never deleted.

Anyone run into the answer to remove the Delete from draft site button?