If you want to remove 'wrap' in your Genesis childtheme like in header, footer-widgets, footer etc, just paste below snipets in your 'functions.php' and remove widget area where you wanted to remove 'wrap'

//* Add support for structural wraps
add_theme_support( 'genesis-structural-wraps', array(
'header',
'nav',
'subnav',
'site-inner',
'footer-widgets',
'footer'
) );