[epiphany] tree-model-sort: Remove unused function pointer from class struct

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 13f48591b83919cb9248f7d1da71e9c0e74ffdca
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Wed Feb 10 14:28:51 2016 -0600

    tree-model-sort: Remove unused function pointer from class struct
    
    It's not even backed by a signal; wonder what this was ever for....

 lib/widgets/ephy-tree-model-sort.h |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/lib/widgets/ephy-tree-model-sort.h b/lib/widgets/ephy-tree-model-sort.h
index 72a1681..eab2078 100644
--- a/lib/widgets/ephy-tree-model-sort.h
+++ b/lib/widgets/ephy-tree-model-sort.h
@@ -45,8 +45,6 @@ struct _EphyTreeModelSort
 struct _EphyTreeModelSortClass
 {
        GtkTreeModelSortClass parent_class;
-
-       void (*node_from_iter) (EphyTreeModelSort *model, GtkTreeIter *iter, void **node);
 };
 
 GType          ephy_tree_model_sort_get_type                 (void);