Part: move BiArcs algorithm to its own class

src/Mod/Part/App/Geometry.h

@@ -329,18 +329,6 @@ public:
     const Handle(Geom_Geometry)& handle() const;
 
 private:
-    void createArcs(double tolerance, std::list<Geometry*>& new_spans,
-                    const gp_Pnt &p_start, const gp_Vec &v_start,
-                    double t_start, double t_end, gp_Pnt &p_end, gp_Vec &v_end) const;
-    enum class Type {
-        SingleArc,
-        SplitCurve,
-        SingleLine
-    };
-    Type calculateBiArcPoints(double t_start, const gp_Pnt& p0, gp_Vec v_start,
-                              double t_end, const gp_Pnt& p4, gp_Vec v_end,
-                              gp_Pnt& p1, gp_Pnt& p2, gp_Pnt& p3) const;
-
     // If during assignment of weights (during the for loop iteratively setting the poles) all weights
     // become (temporarily) equal even though weights does not have equal values
     // OCCT will convert all the weights (the already assigned and those not yet assigned)