STYLE: Remove duplicate macro definition in doc generation script

This issue was introduced by 19c55e0e.

Change-Id: I5e1404fa753e8855c60a7107268ca87569dc06ea

Utilities/Doxygen/doxyfile.in

@@ -177,10 +177,4 @@ PREDEFINED  = "vtkSetMacro(name,type)= \
                    static int IsTypeOf(const char *type); \
                    virtual int IsA(const char *type); \
                    static thisClass* SafeDownCast(vtkObject *o);" \
-               "vtkTypeMacro(thisClass,superclass)= \
-                   typedef superclass Superclass; \
-                   virtual const char *GetClassName(); \
-                   static int IsTypeOf(const char *type); \
-                   virtual int IsA(const char *type); \
-                   static thisClass* SafeDownCast(vtkObject *o);" \
                "VTK_LEGACY(x)= x"