Take a look at your page_landing.php file and find the Footer-widgets code –
//* Remove site footer widgets
remove_action( 'genesis_before_footer', 'aspire_footer_widgets' );
And replace that code with this –
//* Remove site footer widgets
remove_action( 'genesis_before_footer', 'genesis_footer_widget_areas' );
That should remove the footer widgets. I added a Landing Page that you can see here in the demo – http://demo.appfinite.net/aspire/landing-page/
Let me know if that helps.