tdf#143148 Use pragma once instead of include guards

Change-Id: Ifbc367610ee74c2372612c44d27c1a8167175044
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/192074
Tested-by: Jenkins
Reviewed-by: David Gilbert <freedesktop@treblig.org>

vbahelper/source/vbahelper/vbacommandbar.hxx

@@ -16,8 +16,7 @@
  *   except in compliance with the License. You may obtain a copy of
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
-#ifndef INCLUDED_VBAHELPER_SOURCE_VBAHELPER_VBACOMMANDBAR_HXX
-#define INCLUDED_VBAHELPER_SOURCE_VBAHELPER_VBACOMMANDBAR_HXX
+#pragma once
 
 #include <ooo/vba/XCommandBar.hpp>
 
@@ -89,6 +88,4 @@ private:
     OUString maName;
 };
 
-#endif // INCLUDED_VBAHELPER_SOURCE_VBAHELPER_VBACOMMANDBAR_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */