Remove IOBluetooth.h import.

This causes compilation failures due to a bug
in Mac OSX 10.9 and potentially other SDKs.
Enum CBPeripheralAuthorizationStatus is marked
unavailable on OSX in these SDKs.
Removing the include has been confirmed to work
for us on newer OSX versions.

Change-Id: I7c09564f591a1993ab82f36e2fc35a35c3484d43
Reviewed-by: Andras Becsi <andras.becsi@digia.com>