How to hide featured image in Single Post in Wordpress

After hide featured image in Wordpress (from startGBC.com)

I don't know what happened to the recently Wordpress update, but I really hate the way that my featured image being added to inside the post. So what I do is simply to remove featured image on posts.

Step 1: open your style.css or custom css in your theme

Step 2: insert this miracle line:

.single .featured-image { display: none; }

Have fun!