[glom] CanvasEditable: Remove unused private member variables.

[Murray Cumming <murrayc src gnome org>]

commit fd858a08c8078b5c0a2f2d8884fa3ec7bd2df4e0
Author: Murray Cumming <murrayc murrayc com>
Date:   Fri Apr 1 23:17:40 2016 +0200

    CanvasEditable: Remove unused private member variables.
    
    Found by clang-tidy.

 glom/utility_widgets/canvas/canvas_editable.cc |    2 --
 glom/utility_widgets/canvas/canvas_editable.h  |    3 ---
 2 files changed, 0 insertions(+), 5 deletions(-)
---
diff --git a/glom/utility_widgets/canvas/canvas_editable.cc b/glom/utility_widgets/canvas/canvas_editable.cc
index 8e85134..c4e4bcc 100644
--- a/glom/utility_widgets/canvas/canvas_editable.cc
+++ b/glom/utility_widgets/canvas/canvas_editable.cc
@@ -28,8 +28,6 @@ namespace Glom
 {
 
 CanvasEditable::CanvasEditable()
-: m_dragging(false),
-  m_drag_x(0.0), m_drag_y(0.0)
 {
   m_grid = CanvasGroupGrid::create();
   add_item(m_grid);
diff --git a/glom/utility_widgets/canvas/canvas_editable.h b/glom/utility_widgets/canvas/canvas_editable.h
index 18eb678..a0515e6 100644
--- a/glom/utility_widgets/canvas/canvas_editable.h
+++ b/glom/utility_widgets/canvas/canvas_editable.h
@@ -102,9 +102,6 @@ private:
   
   void on_item_selected(const Glib::RefPtr<CanvasItemMovable>& item, bool group_select);
 
-  bool m_dragging;
-  double m_drag_x, m_drag_y;
-
   class ItemInfo
   {
   public: