On the checkout page, there is a button which says, "Use Billing Address for shipping". Essentially my question is, how do I get rid of that button and simply have the additional form elements on the page?
I also noticed when that option is open, I cannot click it to close without it flashing required fields in the shipping address area... Seems like a bug, no?
In OrderForm.php simply remove creation of the shipping form fields. In OrderForm.php remove code in beforeprocessing that checks the action useshipping address or use memberaddress. In ShoppingCart.php remove references to using shipping address.
OrderInformation templates may also refer to shipping fields so check that too.