tdf#124176: Use pragma once instead of include guards

Change-Id: I6182d5b123b183603708b6d0d83e4aeac7c85dc9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/106304
Tested-by: Jenkins
Reviewed-by: Muhammet Kara <muhammet.kara@collabora.com>

sw/source/uibase/uno/SwXDocumentSettings.hxx

@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_SW_SOURCE_UIBASE_UNO_SWXDOCUMENTSETTINGS_HXX
-#define INCLUDED_SW_SOURCE_UIBASE_UNO_SWXDOCUMENTSETTINGS_HXX
+#pragma once
 
 #include <comphelper/MasterPropertySet.hxx>
 #include <com/sun/star/lang/XServiceInfo.hpp>
@@ -75,6 +74,5 @@ public:
     virtual css::uno::Sequence< css::uno::Type > SAL_CALL getTypes(  ) override;
     virtual css::uno::Sequence< sal_Int8 > SAL_CALL getImplementationId(  ) override;
 };
-#endif
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */