[gimp] app: remove unused field from GimpPolygonSelectToolPrivate

[Ell <ell src gnome org>]

commit eda421e852e1885f15e965622ff7c843010623bd
Author: Ell <ell_se yahoo com>
Date:   Thu Apr 25 04:18:47 2019 -0400

    app: remove unused field from GimpPolygonSelectToolPrivate

 app/display/gimptoolpolygon.c | 3 ---
 1 file changed, 3 deletions(-)
---
diff --git a/app/display/gimptoolpolygon.c b/app/display/gimptoolpolygon.c
index 7c8174eec8..e85c1b9a03 100644
--- a/app/display/gimptoolpolygon.c
+++ b/app/display/gimptoolpolygon.c
@@ -101,9 +101,6 @@ struct _GimpToolPolygonPrivate
   /* Is the polygon closed? */
   gboolean           polygon_closed;
 
-  /* The selection operation active when the tool was started */
-  GimpChannelOps     operation_at_start;
-
   /* Whether or not to constrain the angle for newly created polygonal
    * segments.
    */