shell: Replace ifdefs with #pragma once

shell/cc-panel-list.h

@@ -18,8 +18,7 @@
  * Author: Georges Basile Stavracas Neto <gbsneto@gnome.org>
  */
 
-#ifndef CC_PANEL_LIST_H
-#define CC_PANEL_LIST_H
+#pragma once
 
 #include <glib-object.h>
 
@@ -78,6 +77,3 @@ void                 cc_panel_list_set_selection_mode            (CcPanelList
                                                                   GtkSelectionMode    selection_mode);
 
 G_END_DECLS
-
-#endif /* CC_PANEL_LIST_H */
-

shell/cc-shell.h

@@ -19,8 +19,7 @@
  * Author: Thomas Wood <thos@gnome.org>
  */
 
-#ifndef _CC_SHELL_H
-#define _CC_SHELL_H
+#pragma once
 
 #include <gtk/gtk.h>
 
@@ -76,5 +75,3 @@ void            cc_shell_embed_widget_in_header   (CcShell         *shell,
                                                    GtkPositionType  position);
 
 G_END_DECLS
-
-#endif /* _CC_SHELL_H */

shell/cc-window.h

@@ -18,8 +18,7 @@
  * Author: Thomas Wood <thos@gnome.org>
  */
 
-#ifndef _CC_WINDOW_H
-#define _CC_WINDOW_H
+#pragma once
 
 #include <glib-object.h>
 #include "cc-shell.h"
@@ -38,5 +37,3 @@ void cc_window_set_search_item (CcWindow *center,
                                 const char *search);
 
 G_END_DECLS
-
-#endif /* _CC_WINDOW_H */