Remove text underline from button

For some reason, the text within buttons is underlined on one of my Commerce pages (for all product listings).  No other buttons on other pages of the site have this issue. 

For reference, the page is: https://www.judithandrolfe.com/fine-art .  When you click into any of the products, you will see the CONTACT FOR PRICING button at the bottom.  How can the text underline be removed?  The button was added in the Additional Info section of the product, and I'm using the Forte template if that matters.

To be clear, in Site Styles, Underline Body Links IS checked, since I do want to keep links underlined on the rest of the site. 

Thanks in advance for the help.