rm default c'tor and operator

GUI/Model/Descriptor/DoubleDescriptor.h

@@ -84,8 +84,6 @@ public:
 
     DoubleDescriptor() = default;
 
-    DoubleDescriptor(const DoubleDescriptor& other) = default;
-
 public:
     //! Return the current value of the handled parameter.
     operator double() const;

GUI/ba3d/def.h

@@ -33,9 +33,6 @@ struct Vector3D {
     Vector3D(float);
     Vector3D(float, float, float);
 
-    Vector3D(const Vector3D&) = default;
-    Vector3D& operator=(const Vector3D&) = default;
-
     Vector3D(QVector3D const&);
     operator QVector3D() const;