Removing drop shadow on featured images in ZeroGravity

Hi there,

I’m wondering if anyone can help me figure out the CSS code I need to add to my style sheet to remove drop shadows around featured images that appear on my home page? I’ve managed to find a previous thread with code to remove drop shadows from images in posts, but it doesn’t affect the featured images.

Thanks!
(blog location: https://www.raincityreads.com)