0027067: Avoid use of virtual methods for implementation of destructors in legacy classes

Redundant methods Delete() and Desroy(), created in CDL as a hack to define destructor for the class, are removed; their definitions are converted to definition of destructors. In a couple of places methods Destroy() are preserved (bug made non-virtual) because they are called explicitly.

src/math/math_FunctionSetRoot.hxx

@@ -61,8 +61,7 @@ public:
   //! constructor.
   Standard_EXPORT math_FunctionSetRoot(math_FunctionSetWithDerivatives& F, const Standard_Integer NbIterations = 100);
   
-  //! Destructor alias.
-  Standard_EXPORT void Delete() const;
+  //! Destructor
   Standard_EXPORT virtual ~math_FunctionSetRoot();
   
   //! Initializes the tolerance values.