For example suppose below is the code inside <body> of one of the page of website
For example this is page for desktop Browsers.
<h1>A Responsive page</h1>
<h1>This is a Page Sub Title</h1>
<h2>Demonstrating EM and STRONG</h2>
<p>This text will have more importance></p>
</section><!-- .hs1 -->
</div><!-- .main -->
<p>copyright © year</p>
And using same page for Mobile devices I only want to remove <aside>...</aside> from the source.
Edit after some responses