How to: Remove Featured Image Thubmnail from Post Listings?

I know there are more customizations in paid version. In the meantime, hoping for a CSS hack or to point me where in the theme editor to remove the Thumbnail from showing with the actual post listings. I am using the "featured image" primarily for the Slider and it does not look good when shown next to the post in my case. URL: http://www.avalon-manor.com/ What I Am Trying to Comment out of the code or remove is highlighted in red: http://screencast.com/t/TNdWnlN2YkD Thanks for the help with this.