tdf#143148 Use pragma once instead of include guards.

Change-Id: Ica5fa2616f271d02099eaa4e9cb02481b3e100d5
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/133129
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

include/vcl/ITiledRenderable.hxx

@@ -8,8 +8,7 @@
  *
  */
 
-#ifndef INCLUDED_VCL_ITILEDRENDERABLE_HXX
-#define INCLUDED_VCL_ITILEDRENDERABLE_HXX
+#pragma once
 
 #include <tools/gen.hxx>
 #include <rtl/ustring.hxx>
@@ -340,6 +339,4 @@ public:
 };
 } // namespace vcl
 
-#endif // INCLUDED_VCL_ITILEDRENDERABLE_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */