Remove image on full page blog posts

Hi there,

I’m doing my best to remove the square featured image above a single page of full blog posts.

I was successful at removing the icon from individual blog posts but can’t seem to get them off the blog page.

Here is the blog page:
http://www.actoutsidethebox.com/blog/

Here is what I added to the custom CSS:

.rounded-container .iconfont, .small-preview .iconfont { display: none; }

.template-blog .blog-meta, .multi-big .post_author_timeline, .single-small .post_author_timeline { display: none; }

.single .blog-meta { display: none!important; }

.single-portfolio .page-thumb {
display: none!important;
}