[gegl] buffer-iterator: Silence -Wunused-variable

[Debarshi Ray <debarshir src gnome org>]

commit 0d72a2d7947c496aec0368ce16a5642c7c67118b
Author: Debarshi Ray <debarshir gnome org>
Date:   Thu Feb 9 09:24:06 2017 +0100

    buffer-iterator: Silence -Wunused-variable
    
    Fallout from 3da03808a3e47ad8ec50e41ed53f3785d7217361

 gegl/buffer/gegl-buffer-iterator.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/gegl/buffer/gegl-buffer-iterator.c b/gegl/buffer/gegl-buffer-iterator.c
index c1b56f5..63be5cf 100644
--- a/gegl/buffer/gegl-buffer-iterator.c
+++ b/gegl/buffer/gegl-buffer-iterator.c
@@ -237,7 +237,6 @@ retile_subs (GeglBufferIterator *iter,
   GeglBufferIteratorPriv *priv = iter->priv;
   GeglRectangle real_roi;
   int index;
-  int level = priv->sub_iter[0].level;
 
   int shift_x = priv->origin_tile.x;
   int shift_y = priv->origin_tile.y;