COMP: Move ITK_DISALLOW_COPY_AND_ASSIGN calls to public section.

Move `ITK_DISALLOW_COPY_AND_ASSIGN` calls to public section following
the discussion in
https://discourse.itk.org/t/noncopyable

If legacy (pre-macro) copy and assing methods existed, subsitute them
for the `ITK_DISALLOW_COPY_AND_ASSIGN` macro.

include/itkErrorFunctionBase.h

@@ -35,6 +35,8 @@ template<typename TMeasurementVector, typename TTargetVector>
 class ErrorFunctionBase : public FunctionBase<TMeasurementVector, TTargetVector>
 {
 public:
+  ITK_DISALLOW_COPY_AND_ASSIGN(ErrorFunctionBase);
+
   /** Standard class type alias. */
   using Self = ErrorFunctionBase;
   using Superclass = FunctionBase<TMeasurementVector, TTargetVector>;
@@ -63,7 +65,6 @@ class ErrorFunctionBase : public FunctionBase<TMeasurementVector, TTargetVector>
 
 private:
 
-  ITK_DISALLOW_COPY_AND_ASSIGN(ErrorFunctionBase);
 };
 
 } // end namespace itk

include/itkInputFunctionBase.h

@@ -34,6 +34,7 @@ template<typename TMeasurementVector, typename TTargetVector>
 class InputFunctionBase : public FunctionBase<TMeasurementVector, TTargetVector>
 {
 public:
+  ITK_DISALLOW_COPY_AND_ASSIGN(InputFunctionBase);
 
   /** Standard class type alias. */
   using Self = InputFunctionBase;
@@ -69,8 +70,6 @@ class InputFunctionBase : public FunctionBase<TMeasurementVector, TTargetVector>
 
 private:
 
-  ITK_DISALLOW_COPY_AND_ASSIGN(InputFunctionBase);
-
 };//class
 
 } // end namespace Statistics

include/itkNNetDistanceMetricBase.h

@@ -34,6 +34,7 @@ template<typename TMeasurementVector>
 class NNetDistanceMetricBase : public FunctionBase<TMeasurementVector, double>
 {
 public:
+  ITK_DISALLOW_COPY_AND_ASSIGN(NNetDistanceMetricBase );
 
   /** Standard class type alias. */
   using Self = NNetDistanceMetricBase;
@@ -63,11 +64,6 @@ class NNetDistanceMetricBase : public FunctionBase<TMeasurementVector, double>
     os << indent << "NNetDistanceMetricBase(" << this << ")" << std::endl;
     Superclass::PrintSelf( os, indent );
     }
-
-private:
-
-  ITK_DISALLOW_COPY_AND_ASSIGN(NNetDistanceMetricBase );
-
 };
 
 } // end namespace Statistics

include/itkRadialBasisFunctionBase.h

@@ -35,6 +35,7 @@ template<typename ScalarType>
 class RadialBasisFunctionBase : public FunctionBase<ScalarType,ScalarType>
 {
 public:
+  ITK_DISALLOW_COPY_AND_ASSIGN(RadialBasisFunctionBase);
 
   /** Standard class type alias. */
   using Self = RadialBasisFunctionBase;
@@ -81,7 +82,6 @@ class RadialBasisFunctionBase : public FunctionBase<ScalarType,ScalarType>
   ArrayType  m_Center;
   ScalarType m_Radius;
 
-  ITK_DISALLOW_COPY_AND_ASSIGN(RadialBasisFunctionBase);
 };
 
 } // end namespace Statistics

include/itkSquaredDifferenceErrorFunction.h

@@ -36,6 +36,7 @@ template<typename TMeasurementVector, typename ScalarType>
 class ITK_TEMPLATE_EXPORT SquaredDifferenceErrorFunction : public ErrorFunctionBase<TMeasurementVector, ScalarType>
 {
 public:
+  ITK_DISALLOW_COPY_AND_ASSIGN(SquaredDifferenceErrorFunction);
 
   /** Standard class type alias. */
   using Self = SquaredDifferenceErrorFunction;
@@ -64,10 +65,6 @@ class ITK_TEMPLATE_EXPORT SquaredDifferenceErrorFunction : public ErrorFunctionB
   ~SquaredDifferenceErrorFunction() override;
 
   void PrintSelf( std::ostream& os, Indent indent ) const override;
-
-private:
-  ITK_DISALLOW_COPY_AND_ASSIGN(SquaredDifferenceErrorFunction);
-
 };
 
 } // end namespace Statistics

include/itkTransferFunctionBase.h

@@ -35,6 +35,7 @@ template<typename ScalarType>
 class TransferFunctionBase : public FunctionBase<ScalarType, ScalarType>
 {
 public:
+  ITK_DISALLOW_COPY_AND_ASSIGN(TransferFunctionBase);
 
   /** Standard class type alias. */
   using Self = TransferFunctionBase;
@@ -71,7 +72,6 @@ class TransferFunctionBase : public FunctionBase<ScalarType, ScalarType>
 
 private:
 
-  ITK_DISALLOW_COPY_AND_ASSIGN(TransferFunctionBase);
 };
 
 } // end namespace Statistics