Remove title and tagline text

Hi, My site is (myinnerfire.net) I would like to know how to hide the site title and tagline and only display the logo image on the header. I want my site 'identity' to remain the same. Though, I have incorporated all the title text as part of my full logo image and I want to use just the logo image in the header. At the moment, if I uncheck the box that says 'display header text' it removes the title but the tagline still remains. It's annoying. Please help me remove all the text and just show my logo image! Thanks in advance! ~Dustin