Hello
Just open up the index.php file and look for:
<!-- Footer Area -->
You'll see under there where the logo is output. You can just remove this code:
<?php if($s5_pos_logo == "published") { ?>
<div class="s5_logo_module" onclick="window.document.location.href='<?php echo $LiveSiteUrl ?>'">
<?php s5_module_call('logo','notitle'); ?>
</div>
<?php } else { ?>
<img alt="logo" src="<?php echo $s5_directory_path ?>/images/s5_logo<?php if ($s5_theme == "dark") { ?>_white<?php } ?>.png" class="s5_logo" onclick="window.document.location.href='<?php echo $LiveSiteUrl ?>'" />
<?php } ?>
<div style="clear:both; height:0px"></div>