Removed useless virtual inheritance

src/TNL/Containers/Array.h

@@ -26,7 +26,7 @@ template< int, typename > class StaticArray;
 template< typename Element,
           typename Device = Devices::Host,
           typename Index = int >
-class Array : public virtual Object
+class Array : public Object
 {
    public:
 

src/TNL/Matrices/Matrix.h

@@ -20,7 +20,7 @@ namespace Matrices {
 template< typename Real = double,
           typename Device = Devices::Host,
           typename Index = int >
-class Matrix : public virtual Object
+class Matrix : public Object
 {
 public:
    typedef Real RealType;