Delete areas

Hi
Please open the functions.php file( i guided via skype) and enter these codes:
//remove Order Notes Field
add_filter( 'woocommerce_checkout_fields' , 'remove_order_notes' );

function remove_order_notes( $fields ) {
unset($fields['order']['order_comments']);
return $fields;
}
//remove Shipping to different Address
add_filter( 'woocommerce_ship_to_different_address_checked', '__return_false' );
Regards