Return empty string for PRODUCT MAX.
Return empty string for PRODUCT MAX.

Parrot-Developers/libARDiscovery,Parrot-Developers/libARDiscovery,niavok/libARDiscovery,niavok/libARDiscovery,kradhub/libARDiscovery,Parrot-Developers/libARDiscovery,kradhub/libARDiscovery,Parrot-Developers/libARDiscovery,kradhub/libARDiscovery,niavok/libARDiscovery,niavok/libARDiscovery,kradhub/libARDiscovery