FDM supports gizmo uses neighbor data from stl_file

src/slic3r/GUI/Gizmos/GLGizmoFdmSupports.hpp

@@ -49,7 +49,6 @@ public:
     ~GLGizmoFdmSupports() override;
     void set_fdm_support_data(ModelObject* model_object, const Selection& selection);
     bool gizmo_event(SLAGizmoEventType action, const Vec2d& mouse_position, bool shift_down, bool alt_down, bool control_down);
-    using NeighborData = std::pair<size_t, size_t>;
 
 
 private:
@@ -86,8 +85,6 @@ private:
     Button m_button_down = Button::None;
     EState m_old_state = Off; // to be able to see that the gizmo has just been closed (see on_set_state)
 
-    std::vector<std::vector<NeighborData>> m_neighbors; // pairs of vertex_index - facet_index for each mesh
-
 protected:
     void on_set_state() override;
     void on_start_dragging() override;