[gegl] buffer: remove gegl_swap_dir() prototype from gegl-buffer-private.h

[Ell <ell src gnome org>]

commit 4c37a6d40a197ceb798f330fa892a1fd7dea27e3
Author: Ell <ell_se yahoo com>
Date:   Sat Nov 24 11:29:59 2018 -0500

    buffer: remove gegl_swap_dir() prototype from gegl-buffer-private.h
    
    ... it no longer exists.

 gegl/buffer/gegl-buffer-private.h | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/gegl/buffer/gegl-buffer-private.h b/gegl/buffer/gegl-buffer-private.h
index 5b1874efc..69ecefbd1 100644
--- a/gegl/buffer/gegl-buffer-private.h
+++ b/gegl/buffer/gegl-buffer-private.h
@@ -80,8 +80,6 @@ gint              gegl_buffer_leaks       (void);
 
 void              gegl_buffer_stats       (void);
 
-const gchar      *gegl_swap_dir           (void);
-
 void              gegl_tile_cache_init    (void);
 
 void              gegl_tile_cache_destroy (void);