Exclude Additional Info from Emails?

Is there a way to exclude the additional billing and/or shipping information from the emails generated?

I’ve used PGSK as a work around to capture a shipping address for “virtual” products (so those products could ship free with the other items shipping still calculating normally). I’ve customized the checkout templates so the fields only show up when the customer is checking out with just a virtual cart. The problem is now the emails going to the shop manager and (more importantly) the customer have the additional fields on all orders, regardless of if they were asked for/filled in.

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