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/IFGraph/IFGraph_SubPartsIterator.cxx

@@ -253,9 +253,9 @@ IFGraph_SubPartsIterator::IFGraph_SubPartsIterator
 }
 
 //=======================================================================
-//function : Delete
+//function : ~IFGraph_SubPartsIterator
 //purpose  : 
 //=======================================================================
 
-void IFGraph_SubPartsIterator::Delete() 
+IFGraph_SubPartsIterator::~IFGraph_SubPartsIterator() 
 {}