Don’t need the header right widget area? Or perhaps you don’t need 3 columns for your theme. Then your widget areas a.k.a. sidebars are redundant. Unregister them with the following:
/** Unregister default sidebars */ unregister_sidebar( 'header-right' ); unregister_sidebar( 'sidebar' ); unregister_sidebar( 'sidebar-alt' );