deleting alt tag in header

Using the Lifestyle theme, I initially inserted a header image, then later removed it, deleting it from the customize header menu.

What remains appears to be an “alt” tag reading “Fine Woodworking” flush left below the top menu. I already have this as a logo tag line above. How do I remove this?

The source code reads:

<div class=”banner”>
<div class=”wrap”>
<img class=”header-image” src=”” alt=”Fine Woodworking” /> </div>

The URL is: https://www.kevinruble.com/wp/

Thanks!