Content Border

I’m trying to remove the top border on the content section of this theme. I simply cannot seem to get rid of it! I’ve located it in the style.css file and I am 99% sure that it’s this bit of CSS causing it :

#content,
.sidebar {
  border-top: 1px solid #666666;
}

But I just cannot make it go away! I’ve tried the above with ‘border-style: none;” and it did not work. Any help would be really appreciated!