[gnome-photos] export-dialog: Use G_DECLARE_FINAL_TYPE

[Debarshi Ray <debarshir src gnome org>]

commit 8e182ec2a5a45707a0540088d56e8eeb4a579644
Author: Debarshi Ray <debarshir gnome org>
Date:   Fri Nov 18 16:32:47 2016 +0100

    export-dialog: Use G_DECLARE_FINAL_TYPE
    
    https://bugzilla.gnome.org/show_bug.cgi?id=763712

 src/photos-export-dialog.c |    6 ------
 src/photos-export-dialog.h |   14 +-------------
 2 files changed, 1 insertions(+), 19 deletions(-)
---
diff --git a/src/photos-export-dialog.c b/src/photos-export-dialog.c
index 67bc3ac..d3b9672 100644
--- a/src/photos-export-dialog.c
+++ b/src/photos-export-dialog.c
@@ -43,12 +43,6 @@ struct _PhotosExportDialog
   gdouble reduced_zoom;
 };
 
-struct _PhotosExportDialogClass
-{
-  GtkDialogClass parent_class;
-};
-
-
 enum
 {
   PROP_0,
diff --git a/src/photos-export-dialog.h b/src/photos-export-dialog.h
index 616abdd..b4321a4 100644
--- a/src/photos-export-dialog.h
+++ b/src/photos-export-dialog.h
@@ -28,19 +28,7 @@
 G_BEGIN_DECLS
 
 #define PHOTOS_TYPE_EXPORT_DIALOG (photos_export_dialog_get_type ())
-
-#define PHOTOS_EXPORT_DIALOG(obj) \
-  (G_TYPE_CHECK_INSTANCE_CAST ((obj), \
-   PHOTOS_TYPE_EXPORT_DIALOG, PhotosExportDialog))
-
-#define PHOTOS_IS_EXPORT_DIALOG(obj) \
-  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
-   PHOTOS_TYPE_EXPORT_DIALOG))
-
-typedef struct _PhotosExportDialog      PhotosExportDialog;
-typedef struct _PhotosExportDialogClass PhotosExportDialogClass;
-
-GType               photos_export_dialog_get_type           (void) G_GNUC_CONST;
+G_DECLARE_FINAL_TYPE (PhotosExportDialog, photos_export_dialog, PHOTOS, EXPORT_DIALOG, GtkDialog);
 
 GtkWidget          *photos_export_dialog_new                (GtkWindow *parent, PhotosBaseItem *item);