[gegl] operation-meta: Remove a duplicate G_DEPRECATED

[Debarshi Ray <debarshir src gnome org>]

commit a157cb1384027ca769bdfec25bcb866b541f5698
Author: Debarshi Ray <debarshir gnome org>
Date:   Wed May 20 21:16:47 2020 +0200

    operation-meta: Remove a duplicate G_DEPRECATED
    
    It's enough to place it before the function declaration in the header
    file, like elsewhere across the codebase.
    
    Fallout from 7a00a24d43a9eb2b98d82d64c19cf8937224517f

 gegl/operation/gegl-operation-meta.c | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/gegl/operation/gegl-operation-meta.c b/gegl/operation/gegl-operation-meta.c
index 15d1c5749..b2d891e67 100644
--- a/gegl/operation/gegl-operation-meta.c
+++ b/gegl/operation/gegl-operation-meta.c
@@ -80,7 +80,6 @@ gegl_operation_meta_watch_node (GeglOperation     *operation,
   g_warning ("%s does nothing\n", __FUNCTION__);
 }
 
-G_DEPRECATED
 void
 gegl_operation_meta_watch_nodes (GeglOperation     *operation,
                                  GeglNode          *node,