As I understand it, it depends on how you obtained your Jolla device...

If you got it for ~15% cheaper through a special partner, then you'd be expected to put up with the partner screen (I'm sure there'll be unofficial workarounds, but I'm also sure they'll try to make it compelling so people won't be in a hurry to remove it), but if you paid for a normal Jolla device that's not from a partner bundle, then you won't have the screen, unless you want to hack it back in -for some reason.