Part: modernize C++: use equals default

src/Mod/Part/Gui/DlgPrimitives.cpp

@@ -1805,9 +1805,7 @@ DlgPrimitives::DlgPrimitives(QWidget* parent, Part::Primitive* feature)
 /*
  *  Destroys the object and frees any allocated resources
  */
-DlgPrimitives::~DlgPrimitives()
-{
-}
+DlgPrimitives::~DlgPrimitives() = default;
 
 void DlgPrimitives::activatePage()
 {
@@ -2199,11 +2197,6 @@ TaskPrimitives::TaskPrimitives()
     Content.push_back(taskbox);
 }
 
-TaskPrimitives::~TaskPrimitives()
-{
-    // automatically deleted in the sub-class
-}
-
 QDialogButtonBox::StandardButtons TaskPrimitives::getStandardButtons() const
 {
     return QDialogButtonBox::Close|
@@ -2247,11 +2240,6 @@ TaskPrimitivesEdit::TaskPrimitivesEdit(Part::Primitive* feature)
     Content.push_back(taskbox);
 }
 
-TaskPrimitivesEdit::~TaskPrimitivesEdit()
-{
-    // automatically deleted in the sub-class
-}
-
 QDialogButtonBox::StandardButtons TaskPrimitivesEdit::getStandardButtons() const
 {
     return QDialogButtonBox::Cancel |