Hi John,
You’ll want to edit the templates\header.php file, and look for the following piece of code about 15 lines from the top:
<div id="caption">
<h1 id="title"><a href="<?php bloginfo('url'); ?>/"><?php bloginfo('name'); ?></a></h1>
<div id="tagline"><?php bloginfo('description'); ?></div>
</div>
Simply remove the <div id="tagline">
line, so the code looks like this:
<div id="caption">
<h1 id="title"><a href="<?php bloginfo('url'); ?>/"><?php bloginfo('name'); ?></a></h1>
</div>
You’ll still have the H1 for your SEO, but the caption will be gone. Hope this helps!