No need for a virtual do-nothing destructor in a class that isn't
inherited from. Defining an empty init merely makes QTest go to the
trouble of calling it, which it could just as well skip.
Change-Id: Ifd44c473c05fdeaaa7923d2ccdd0a13c8921b6bd
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Andy Shaw <andy.shaw@qt.io>