Use "delete" where we are deleting and not just obscuring

Well, I've done what I can. Not a huge deal, since this will generally be scripted and forgotten, but since we have abstract ways of truncating entity tables, I didn't think it was worth trying to untangle all that. I've simply updated the lines for deleting carts and tax numbers and tweaked the language slightly for sanitizing orders.

Automatically closed - issue fixed for 2 weeks with no activity.