[gimp] app: remove deprecated GimpContainerGridView.

[Jehan <jehanp src gnome org>]

commit 8f17d0b0d1dfd4ee10f24b0bb2a261f1f8824cea
Author: Jehan <jehan girinstud io>
Date:   Mon Mar 30 20:39:54 2020 +0200

    app: remove deprecated GimpContainerGridView.
    
    This class has been removed for nearly 2 years.

 app/widgets/widgets-types.h | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/app/widgets/widgets-types.h b/app/widgets/widgets-types.h
index e596877f56..2aaf570871 100644
--- a/app/widgets/widgets-types.h
+++ b/app/widgets/widgets-types.h
@@ -88,7 +88,6 @@ typedef struct _GimpChannelTreeView          GimpChannelTreeView;
 typedef struct _GimpContainerBox             GimpContainerBox;
 typedef struct _GimpContainerComboBox        GimpContainerComboBox;
 typedef struct _GimpContainerEntry           GimpContainerEntry;
-typedef struct _GimpContainerGridView        GimpContainerGridView;
 typedef struct _GimpContainerIconView        GimpContainerIconView;
 typedef struct _GimpContainerTreeStore       GimpContainerTreeStore;
 typedef struct _GimpContainerTreeView        GimpContainerTreeView;