tdf#143148 Use pragma once instead of include guards

Change-Id: I84408aa0d48dd7804b70d012c85035e0572fa4e0
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/156256
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

i18npool/source/search/levdis.hxx

@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_I18NPOOL_SOURCE_SEARCH_LEVDIS_HXX
-#define INCLUDED_I18NPOOL_SOURCE_SEARCH_LEVDIS_HXX
+#pragma once
 
 #include <sal/types.h>
 #include <memory>
@@ -209,6 +208,4 @@ public:
 };
 
 
-#endif
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */