Come faccio a rimuovere la sottolineatura dentro al <sup> ?

<html>
<body>



This text contains <sub>subscript</sub> text.</p>
<a href="#">

This text contains <sup style="text-decoration:none;">superscript</sup> text.</p></a>

</body>
</html>



http://www.w3schools.com/TAGS/tryit....me=tryhtml_sup