I'm probably not alone in thinking that it's better not to store credit card information in your HH profile right now.
Keep checking back on your credit card information to make sure it stays gone.
I thought deleted my card details after a lengthy process - the system would say my profile was updated and the card details vanished. But the next time I logged in the card information was back again.
So taking trip from others on the forum, I used the app instead of the laptop to delete card information. It seemed to work.
But then after I had a stay at a property I found the card I'd used at that particular hotel was back in my profile. It just kept coming back ...
Now what I've done is added a card number for an account that was recently closed. After my hotel stay next week I'll check to see if that old card is still on file or whether my HHonors card number details have (again) replaced it.