Rémi Bernon (@rbernon) commented about include/windows.devices.usb.idl:
} [
activatable(Windows.Devices.Usb.IUsbSetupPacketFactory, Windows.Foundation.UniversalApiContract, 1.0),
Let's just comment it, it's tedious enough to catch missing attributes when reviewing IDL additions and I don't think it's a good idea to remove attributes just because they are getting in the way.