post changes after merging BS1.7.4

Remove tracking etc..

src/slic3r/GUI/Camera.hpp

@@ -163,7 +163,6 @@ private:
     void set_distance(double distance);
 
     void set_default_orientation();
-    void set_iso_orientation();
     Vec3d validate_target(const Vec3d& target) const;
     void update_zenit();
     void update_target();