[gtk] treeview: Remove unused member

[Timm Bäder <baedert src gnome org>]

commit 6c8a5f5e2f813c03d95edef8a78861f4f9be52c7
Author: Timm Bäder <mail baedert org>
Date:   Sun Apr 28 06:45:33 2019 +0200

    treeview: Remove unused member

 gtk/gtktreeview.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index 19c085a1c1..8c03111ca8 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -400,7 +400,6 @@ struct _GtkTreeViewPrivate
 
   /* Non-interactive Header Resizing, expand flag support */
   gint last_extra_space;
-  gint last_extra_space_per_column;
   gint last_number_of_expand_columns;
 
   /* Row drag-and-drop */
@@ -2467,10 +2466,10 @@ gtk_tree_view_size_allocate_columns (GtkWidget *widget)
 
   if (update_expand)
     {
-      tree_view->priv->last_extra_space_per_column = extra_per_column;
       tree_view->priv->last_number_of_expand_columns = number_of_expand_columns;
     }
 
+  int i = 0;
   for (list = first_column;
        list != last_column->next;
        list = list->next)