Improve node to svg conversion.

src/visual_elements/nodes/GeometryNode.h

@@ -27,23 +27,7 @@ public:
 protected:
     unsigned mStrokeThickness{0};
     Type mType;
-
     bool mGeometryIsDirty{true};
 };
 
-class LineNode : public GeometryNode
-{
-public:
-    LineNode(const Point& location)
-    :    GeometryNode(location)
-    {
-
-    }
-
-    Type getType()
-    {
-        return Type::Line;
-    }
-};
-
 using GeometryNodePtr = std::unique_ptr<GeometryNode>;