Actualy you can let the AI place the TC and then do a delete object. (better if you place it your self it's easer to find.
But I am at a complete loss as to why you would ewant to do that a littel more info and I mite come up with a better answer. By the way you have to be real carefull no town center is one of the defrule's that cause a resign at 5 min into the game so you need to make sure the computer has a tc by 5 min or you need to install a complete new AI that does not do the resign check. Even my resign check will quit at 5 min if there are no vil and no way to make them.