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

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

commit cd813016e42cd4c7e6ad322029bd8bad072b93be
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Nov 21 20:35:09 2019 +1300

    info-overview: Replace ifdefs with #pragma once

 panels/info-overview/cc-info-overview-panel.h | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)
---
diff --git a/panels/info-overview/cc-info-overview-panel.h b/panels/info-overview/cc-info-overview-panel.h
index 4d0c2f1d9..78a678583 100644
--- a/panels/info-overview/cc-info-overview-panel.h
+++ b/panels/info-overview/cc-info-overview-panel.h
@@ -17,8 +17,7 @@
  *
  */
 
-#ifndef CC_INFO_OVERVIEWPANEL_H
-#define CC_INFO_OVERVIEWPANEL_H
+#pragma once
 
 #include <shell/cc-panel.h>
 
@@ -29,7 +28,4 @@ G_DECLARE_FINAL_TYPE (CcInfoOverviewPanel, cc_info_overview_panel, CC, INFO_OVER
 
 GtkWidget *cc_info_overview_panel_new (void);
 
-
 G_END_DECLS
-
-#endif /* CC_INFO_OVERVIEWPANEL_H */