Its going to depend on whether your daughter wants to use the code at any point in the future. If not then snipping it off is the best option. If there is the possibility you ever wanted to resell her or they wanted to use the code, unfortunately she would be best to put up with it. As others have mentioned, there is no way to remove it other than cutting (or popping the dolls head off if you prefer) - its designed so that it cant be lost.