Messages

Just delete this line:

<div class="pull-right textright"> <?php echo $text_powered_by ?> <a href="..." onclick="window.open(this.href);return false;"
title="Ideal OpenSource E-commerce Solution">AbanteCart</a>
</div>

in this file: storefront>view>default_html5>template>common>footer.tpl

if you are using the default html 5 theme. I hope it helps.