2) Go to your Admin CP. Go to Style & Templates -> Style Manager. It will list all the styles you currently have on the site. To the right of each style will be a "<< >>" button. Click on that to expand the Style of choice. Now you will have a list of templates in a box. Scroll down until you see the template named header. Click on the Customize button (or the edit button if its already been editted before). You will see this
Or something similar to that. You can just remove that and save the template. id only recommend doing it this way on the default style. Custom styles tend to have a lot more added into that and can make the site look funky without that stuff in there or without other editting of the style.