Ted here from Shopify, thanks for reaching out to us.
I can disable the Shipment Out for Delivery and Shipment Delivered notifications for you if you would like. This action can only be completed by our Support directly.
To change this on your account, could you email firstname.lastname@example.org from the email address you use to sign into Shopify? When you do, you should receive an automated email back with a ticket number assigned. If you let me know what that ticket number is (or your email address), I'll have a look into this with you.
Feel free to reach out to our Support team any time as well. We're here 24/7 via Facebook, Twitter, chats, emails and phone. Just click 'talk to support’ for some more info.