Part: modernize C++: use equals default

src/Mod/Part/App/PrimitiveFeature.cpp

@@ -75,9 +75,7 @@ Primitive::Primitive()
     touch();
 }
 
-Primitive::~Primitive()
-{
-}
+Primitive::~Primitive() = default;
 
 short Primitive::mustExecute() const
 {
@@ -170,9 +168,7 @@ Vertex::Vertex()
     ADD_PROPERTY(Z,(0.0f));
 }
 
-Vertex::~Vertex()
-{
-}
+Vertex::~Vertex() = default;
 
 short Vertex::mustExecute() const
 {
@@ -225,9 +221,7 @@ Line::Line()
     ADD_PROPERTY_TYPE(Z2,(1.0),"Vertex 2 - Finish",App::Prop_None,"Z value of the finish vertex");
 }
 
-Line::~Line()
-{
-}
+Line::~Line() = default;
 
 short Line::mustExecute() const
 {
@@ -988,9 +982,7 @@ Ellipse::Ellipse()
     Angle2.setConstraints(&angleRange);
 }
 
-Ellipse::~Ellipse()
-{
-}
+Ellipse::~Ellipse() = default;
 
 short Ellipse::mustExecute() const
 {