Hello Teju,
You can remove link from logo.Please open header.php file and remove link.
Goto > Theme > Your theme > layout > includes > header.php
you will get code like below line
<div class="logo"><a href="<?php echo $CFG->wwwroot;?>"><img src="<?php echo get_logo_url(); ?>" width="243" height="77" alt="themename"></a></div>
remove 'a' tag from div.
thanks