[gimp] app: don't invalidate the buffer source in gimp_drawable_real_update()

[Michael Natterer <mitch src gnome org>]

commit c2cef394b256a72ef254b62960ed0377d3048fc5
Author: Michael Natterer <mitch gimp org>
Date:   Sun Feb 14 22:39:42 2016 +0100

    app: don't invalidate the buffer source in gimp_drawable_real_update()
    
    This was an artifact from the times of the initial GEGL port,
    apparently something was broken in GEGL at the time.

 app/core/gimpdrawable.c |   16 ----------------
 1 files changed, 0 insertions(+), 16 deletions(-)
---
diff --git a/app/core/gimpdrawable.c b/app/core/gimpdrawable.c
index fb1294c..384c77e 100644
--- a/app/core/gimpdrawable.c
+++ b/app/core/gimpdrawable.c
@@ -742,22 +742,6 @@ gimp_drawable_real_update (GimpDrawable *drawable,
                            gint          width,
                            gint          height)
 {
-  if (drawable->private->buffer_source_node)
-    {
-      GObject *operation = NULL;
-
-      g_object_get (drawable->private->buffer_source_node,
-                    "gegl-operation", &operation,
-                    NULL);
-
-      if (operation)
-        {
-          gegl_operation_invalidate (GEGL_OPERATION (operation),
-                                     GEGL_RECTANGLE (x,y,width,height), FALSE);
-          g_object_unref (operation);
-        }
-    }
-
   gimp_viewable_invalidate_preview (GIMP_VIEWABLE (drawable));
 }