tdf#143148: Use pragma once instead of include guards

Change-Id: Iac334c822ab0699b5cc5122e5f2b1a2b9662f58e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/177784
Reviewed-by: Skyler Grey <skyler.grey@collabora.com>
Tested-by: Jenkins

sw/inc/edglbldc.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_SW_INC_EDGLBLDC_HXX
-#define INCLUDED_SW_INC_EDGLBLDC_HXX
+#pragma once
 
 #include <o3tl/sorted_vector.hxx>
 
@@ -64,6 +63,4 @@ public:
 
 class SwGlblDocContents : public o3tl::sorted_vector<std::unique_ptr<SwGlblDocContent>, o3tl::less_ptr_to > {};
 
-#endif
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */