lets say, in _main.php I have some placeholder regions for content/sidebar
<div id="content">foo</div>
<div id="sidebar">bar</div>
in my home.php template, maybe i don't want the sidebar div at all. But when I put in the intentionally blank code
<region id="sidebar"></region>
I simply make my sidebar div blank, it doesn't remove it.
Q: Is there a slick way to simply nuke that div#sidebar entirely from markup?