utils: p-i-d StaticInformation::DoGather() does not need to create an Object

Creating an Object would call ObjectBase::ConstructSelf() on an object
with "ns3::Object" TypeId, thus hitting the abort macro added to
prevent calling ObjectBase::Constructself() in the constructor of
a class deriving from the Object class.

utils/print-introspected-doxygen.cc

@@ -453,7 +453,6 @@ StaticInformation::DoGather(TypeId tid)
             TypeId pointee = ptrChecker->GetPointeeTypeId();
 
             // See if this is a pointer to an Object.
-            Ptr<Object> object = CreateObject<Object>();
             TypeId objectTypeId = Object::GetTypeId();
             if (objectTypeId == pointee)
             {