Genesis: Change Featured Image Attributes

functions.php

remove_filter( 'genesis_attr_entry-image', 'genesis_attributes_entry_image' );
add_filter( 'genesis_attr_entry-image', 'webendev_attributes_entry_image' );
/**
 * Change Featured Image (Alignment)
 */
function webendev_attributes_entry_image( $attributes ) {

	$attributes['class'	]	= 'alignnone post-image entry-image';
	$attributes['itemprop'] = 'image';

	return $attributes;
}