Remove Feature Image Inside Post

I have featured images shown on excerpts of my blog posts on the main Blog page, but when a person clicks on any particular post, I don’t want the featured image shown. I’ve looked at other threads and not found a solution that works for me. Can someone take a look at my site and tell me what I need to do?

I am using a child theme and wondering if there’s a snippet I could put in my child theme’s function.php.

My blog site is https://primemedicaltraining.com/blog

Thank you.