I've disabled Twiiter Cards meta data option but it is still showing in header

I’ve disabled the Twitter Cards meta data option but it is still showing in the header. Please help I want to remove it and get rid of it. I’ve tried all other FAQs and questions but didn’t find any resolution. The sample page is http://cuttinglet.com/microsoft-sculpt-keyboard-and-mouse/

http://wordpress.org/plugins/wordpress-seo/