Remove Feature Image from Posts

Hi all

Another problem, I would like to remove the feature image from individual posts such as on this page
https://www.mylittleguangzhou.com/eat-drink-2/the-coziest-cafe-in-guangzhou

but NOT on the category pages where it’s linked to a post excerpt (e.g. in the image grids on this page)
https://www.mylittleguangzhou.com/category-test

Any ideas? I found this but couldn’t find the code they were referring to
https://www.ads-software.com/support/topic/remove-featured-image-from-post-4?replies=20

Thanks