How To Remove the Featured Image from Blog single Post

I need to have the featured image showing everywhere in the site, except in the single post.
Basically the same question you answered here (https://support.ishyoboy.com/forums/topic/how-to-remove-the-featured-image-from-blog-post-but-retain-on-main-page/) but the code on Creolio is significantly different.

Thank your for any help.