[gnome-control-center] notifications: Replace ifdefs with #pragma once

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit fceac14a2c2ac39e4c9909f851505f8d9d40e8bb
Author: Robert Ancell <robert ancell canonical com>
Date:   Tue May 29 15:38:56 2018 +1200

    notifications: Replace ifdefs with #pragma once

 panels/notifications/cc-edit-dialog.h         | 5 +----
 panels/notifications/cc-notifications-panel.h | 5 +----
 2 files changed, 2 insertions(+), 8 deletions(-)
---
diff --git a/panels/notifications/cc-edit-dialog.h b/panels/notifications/cc-edit-dialog.h
index c0dc27427..d8d040b89 100644
--- a/panels/notifications/cc-edit-dialog.h
+++ b/panels/notifications/cc-edit-dialog.h
@@ -17,8 +17,7 @@
  *
  */
 
-#ifndef _CC_EDIT_DIALOG_H_
-#define _CC_EDIT_DIALOG_H_
+#pragma once
 
 #include "cc-notifications-panel.h"
 
@@ -31,5 +30,3 @@ void cc_build_edit_dialog (CcNotificationsPanel *panel,
                            GDBusProxy           *perm_store);
 
 G_END_DECLS
-
-#endif /* _CC_EDIT_DIALOG_H_ */
diff --git a/panels/notifications/cc-notifications-panel.h b/panels/notifications/cc-notifications-panel.h
index 6d6bcb108..386e3d8fb 100644
--- a/panels/notifications/cc-notifications-panel.h
+++ b/panels/notifications/cc-notifications-panel.h
@@ -17,8 +17,7 @@
  *
  */
 
-#ifndef _CC_NOTIFICATIONS_PANEL_H_
-#define _CC_NOTIFICATIONS_PANEL_H_
+#pragma once
 
 #include <gio/gio.h>
 #include <shell/cc-panel.h>
@@ -30,5 +29,3 @@ G_BEGIN_DECLS
 G_DECLARE_FINAL_TYPE (CcNotificationsPanel, cc_notifications_panel, CC, NOTIFICATIONS_PANEL, CcPanel)
 
 G_END_DECLS
-
-#endif /* _CC_EDIT_DIALOG_H_ */