Deletes a custom attribute associated with a customer profile.
DELETE
/v2/orders/{order_id}/custom-attributes/{custom_attribute_key}
Deletes a custom attribute associated with a customer profile.
To delete a custom attribute owned by another application, the visibility setting must be VISIBILITY_READ_WRITE_VALUES. Note that seller-defined custom attributes (also known as custom fields) are always set to VISIBILITY_READ_WRITE_VALUES.
The ID of the target order.