[gegl] Remove dead code in GeglOperation

[Daniel Sabo <daniels src gnome org>]

commit 105f616a48411eb0ae52bf2238b3ca9ec3c416a4
Author: Daniel Sabo <DanielSabo gmail com>
Date:   Tue Feb 4 11:26:27 2014 -0800

    Remove dead code in GeglOperation
    
    Graph meta nodes are never traversed so calling
    get_invalidated_by_change() is not meaningful.

 gegl/operation/gegl-operation.c |   17 -----------------
 1 files changed, 0 insertions(+), 17 deletions(-)
---
diff --git a/gegl/operation/gegl-operation.c b/gegl/operation/gegl-operation.c
index 75e274f..7626e38 100644
--- a/gegl/operation/gegl-operation.c
+++ b/gegl/operation/gegl-operation.c
@@ -373,23 +373,6 @@ get_invalidated_by_change (GeglOperation        *self,
                            const gchar         *input_pad,
                            const GeglRectangle *input_region)
 {
-#if 0
-  /* FIXME: this seems to sometimes go into an infinite loop, the
-   * current workaround of passing the rectangle straight through
-   * isn't even true for unsharp-mask/drop-shadow/difference of gaussians,
-   * but it stops a crasher bug.
-   *
-   * This needs to be revisited as part of the core processing revisit
-   * (perhaps together with a meta-op framework revwrite).
-   */
-  if (self->node->is_graph)
-    {
-      return gegl_operation_get_invalidated_by_change (
-               gegl_node_get_output_proxy (self->node, "output")->operation,
-               input_pad,
-               input_region);
-    }
-#endif
   return *input_region;
 }