Use '#pragma once' in vclxfont.hxx

Change-Id: I445ec8a08c6622c681e459efc2dd2afbf74dd78e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/177794
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
Tested-by: Jenkins

include/toolkit/awt/vclxfont.hxx

@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_TOOLKIT_AWT_VCLXFONT_HXX
-#define INCLUDED_TOOLKIT_AWT_VCLXFONT_HXX
+#pragma once
 
 #include <config_options.h>
 #include <memory>
@@ -67,7 +66,4 @@ public:
     sal_Bool                                        SAL_CALL hasGlyphs( const OUString& aText ) override;
 };
 
-
-#endif // INCLUDED_TOOLKIT_AWT_VCLXFONT_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */