The example created two QPropertyAnimation instances that controlled
the same property; this caused a clash for some transitions.
Remove the smoothFlipXRotation and smoothFlipYRotation animations;
they are not needed as equivalent animations are already set as
defaults for the state machine.
Fixes: QTBUG-28081
Change-Id: Ifa7a09d48cd4905df720e3327914320ed74ebae6
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
e05511a364