To remove the shipping address fields on the checkout page, go to Settings >> Checkout and Self-Serve Portal (under Customer-facing essentials) >> Field configurations (on the left panel). Now go to the appropriate section on this page and uncheck the Show option for the fields you'd like to hide. 

Here's a video for your reference. 

Note: These fields can be still be populated in the background via the checkout page URL/API.

If you're using the V3 checkout pages, check this article.