That’s the fadeup effect. You can remove it from the front-page.php file in the front-page-1 widget code. Look for this –
genesis_widget_area( 'front-page-1', array(
'before' => '<div id="front-page-1" class="front-page-1"><div class="fp1 image-section"><div class="flexible-widgets widget-area fadeup-effect"><div class="wrap">',
'after' => '</div></div></div></div>',
) );
Then remove this part – fadeup-effect