I'd like to remove the "Posted By" box

Open ‘t4b_featured_slider.php’ and delete line 300.

Appreciated. I had figured out how to remove it with CSS somehow, but this solution is the most optimal.

Is there any way to remove the text and make the whole slider your featured image? I’m looking for a slider that will look like this: https://www.housebeautiful.com/

Thanks!