STYLE: Prefer = delete to explicitly trivial implementations

This check replaces undefined special member functions with
= delete;. The explicitly deleted function declarations enable more
opportunities in optimization, because the compiler might treat
explicitly delted functions as noops.

Additionally, the C++11 use of = delete more clearly expreses the
intent for the special member functions.

Author: hjmjohnson

include/itkAnalyzeObjectLabelMapImageIOFactory.h

@@ -67,9 +67,9 @@ class ITK_EXPORT AnalyzeObjectLabelMapImageIOFactory : public ObjectFactoryBase
   PrintSelf(std::ostream & os, Indent indent) const override;
 
 private:
-  AnalyzeObjectLabelMapImageIOFactory(const Self &); // purposely not implemented
+  AnalyzeObjectLabelMapImageIOFactory(const Self &) = delete; // purposely not implemented
   void
-  operator=(const Self &); // purposely not implemented
+  operator=(const Self &) = delete; // purposely not implemented
 };
 
 } // end namespace itk