Let's go to your Account and Settings and get your Shipping From field hidden.
But before we proceed. I'd like to clarify if you've added the "Shipping From" field as a custom field. If so, please follow these steps to hide it:
1. Click the Gear icon.
2. Under Your Company, select Account and Settings.
3. Click the Sales menu, then on the Pencil icon on Sales from content.
4. Unchecked the "Shipping from" under Custom fields, and click Save.
5. Click Done.
If your scenario is different or if you have other concerns, don’t hesitate to comment below. Have a great day ahead!