By default, Genesis will add some classes to the
<body> element depending on how your page header is set up. You may see
header-full-width. Use the following single line of code to stop Genesis from adding these classes altogether.
|* Stop Genesis adding `header-*` classes to <body>.|
|* @since 1.0.0|
|remove_filter( 'body_class', 'genesis_header_body_classes' );|