Redundant Ternary

I was reviewing some third-party C# code earlier and came across this little gem (trimmed down to the important bit)…

bool x = y == z ? true : false;

I have wracked my brain and can not come up with a situation in which I would need the ternary operator ?: to convert a boolean into a boolean as tested by an operator == that already returns a boolean value. Maybe it avoids some kind of compiler warning regarding mixing = and ==.