They took it away, because, some people Deleted the Playing Card deck and then they wanted it back, but there was no way to restore it after deletion. So now it's like a default permanant deck in the list. Not sure if we can delete individual cards from it (haven't tried yet) or change the Card Backing. You can go into the Playing Card Deck's settings/permissions and make sure Players don't even see that it exist so they can't show/hide/show/hide it.