Go into your index.php page (and any other template pages you have created) and take out the code for the comments. I don't know what theme you're using, so I can't tell you too specifically. However, I would reccommend 'commenting it out' as opposed to deleting it from the code untill you are really sure you're taking out what you want. Which means putting the '<!--' comment tags '!-->' before and after. These tags make that code 'invisible' and it won't display on your page.
After you comment it out, then look at the page and make sure you didn't include something within the comment tags you wanted visible or miss anything you meant to remove. It will take some noodling, but you'll get it.
This is one way, and the way I did it. There may be another way.