Fixed classes with undefined constructor.

IterativeRobot and BinaryImage had no constructor
defined (and so would give linker errors).
Error just had an empty constructor defined,
so I switched to "=default".

Change-Id: Ia8efb4282928227878dfefeda58ccb8cf06aabb2

wpilibc/wpilibC++Devices/include/Vision/BinaryImage.h

@@ -18,7 +18,6 @@
 
 class BinaryImage : public MonoImage {
  public:
-  BinaryImage();
   virtual ~BinaryImage() = default;
   int GetNumberParticles();
   ParticleAnalysisReport GetParticleAnalysisReport(int particleNumber);