[gnome-photos] utils: Remove redundant cast

[Debarshi Ray <debarshir src gnome org>]

commit dee760e4c172025c8ea5107effda6d8213706725
Author: Debarshi Ray <debarshir gnome org>
Date:   Fri Oct 27 12:52:48 2017 +0200

    utils: Remove redundant cast

 src/photos-utils.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/photos-utils.c b/src/photos-utils.c
index 71a8d56..8c44c50 100644
--- a/src/photos-utils.c
+++ b/src/photos-utils.c
@@ -1308,7 +1308,7 @@ photos_utils_list_box_header_func (GtkListBoxRow *row, GtkListBoxRow *before, gp
 void
 photos_utils_object_list_free_full (GList *objects)
 {
-  g_list_free_full (objects, (GDestroyNotify) g_object_unref);
+  g_list_free_full (objects, g_object_unref);
 }