I can confirm this as a problem after installing Lumia Black on my 920.
Also,
any app using the native maps control doesn't work anymore. They either flat out crash, are unusable or the map control is empty. I've tried Foursquare, Instagram, Twitter, Path and Facebook so far. Local Scout also doesn't work.
Here Maps and Here Drive+ crash on launch. There are also no settings for maps under Settings > Applications. They were there before the Lumia Black update.
I've tried reseting the phone, reinstalling here maps, removing them and even changing the country and region settings, and pretty much everything else I can think of. My only guess is that Nokia has started remove Here Maps from phones in regions where maps aren't officially supported.
My phone is for the Pakistan market and Nokia doesn't have Here Maps here officially due to some government restrictions (Google Maps reign supreme here and Apple Maps are good as well) and have had very basic map info. Looks like the government might have asked Nokia to strip the mapping functionality from the device.
I'll try my friend's Lumia 925 tomorrow to see if its affecting other devices as well and will also try to create an app using the Maps control and see what happens.