If you've already included all the bio you want on your home page, then this page can be used for something else. Simply rename it.
To rename this or any page, click the "Edit menu" box directly above the navigation bar (the navigation bar says "Home, My Works, Biography, etc." on it). You must be in Edit Mode to see the "Edit menu" box. Enter a new name for the section and save it.
While you're editing the menu, you may want to hide sections that you're not yet using.
To complete the renaming of this section, click the "Edit page title" box in the center column of this page.