add_filter( 'woocommerce_checkout_fields' , 'virtual_products_less_fields' );

function virtual_products_less_fields( $fields ) {

    $virtual_products = true;

    foreach( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {

        if ( ! $cart_item['data']->is_virtual() ) $virtual_products = false;
    }

    if( $virtual_products===true) {
        unset($fields['billing']['billing_company']);
        unset($fields['billing']['billing_address_1']);
        unset($fields['billing']['billing_address_2']);
        unset($fields['billing']['billing_city']);
        unset($fields['billing']['billing_postcode']);
        unset($fields['billing']['billing_country']);
        unset($fields['billing']['billing_state']);
        unset($fields['billing']['billing_phone']);

        add_filter( 'woocommerce_enable_order_notes_field', '__return_false',9999 );
    }

    return $fields;

}