It will automatically be removed when your products are no longer using it.
Just find the products that are still using that particular type and assign a new type to them, and it will disappear.
Is there any way to edit a product type? I realized I misspelled a product type after I added like 30 products to it. I obviously don’t want to remove all 30 of the products from that type just to edit the name of it. There’s gotta be an easier way.
The product type disappears when there are no products left using it