Want to remove underline from image link

Hi friends, seems many newbie’s like me have faced this problem (source: google) but I’m not able to find a working solution for mine.

NOTE: My web-design partner is out of town, hence asking you guys for help

I have an image link as “Featured Work” in footer area in my wordpress site https://www.acme.66ghz.com

You will notice that it has underline, which I need to remove. I’m using wordpress widget “Text – Arbitrary text or HTML” and putting the following code in that:

<a rel="prettyPhoto" href="https://www.youtube.com/watch?v=YAClHdPrWi4?width=792&height=600"><img src="https://acme.66ghz.com/wp-content/uploads/2010/04/edi-11.jpg" alt="Featured Work" /></a>

Please give me some solution so that the underline disappears from “Featured Work” image link.

Just sharing if it might help:
https://acme.66ghz.com/wp-content/themes/display/style.css
https://acme.66ghz.com/wp-content/themes/display/css/style1.css

– Thanks