To remove the navigation symbols in Beamer, you can use one of the following methods:
<ul>
<li><code>\beamertemplatenavigationsymbolsempty</code></li>
<li><code>\setbeamertemplate{navigation symbols}{}</code></li>
</ul>
Reference: <a href="https://tex.stackexchange.com/questions/686/how-to-get-rid-of-navigation-symbols-in-beamer">https://tex.stackexchange.com/questions/686/how-to-get-rid-of-navigation-symbols-in-beamer</a>