presumably this was intended as include guard

remove it, as it's nonsense

Change-Id: Id8171b81d42dfd3d391b7c5e6602d9271b6697c7

include/tools/debug.hxx

@@ -16,8 +16,8 @@
  *   except in compliance with the License. You may obtain a copy of
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
-#ifndef _TOOLS_DEBUG_HXX
-#define _TOOLS_DEBUG_HXX
+#ifndef INCLUDED_TOOLS_DEBUG_HXX
+#define INCLUDED_TOOLS_DEBUG_HXX
 
 #include "tools/toolsdllapi.h"
 

svx/source/tbxctrls/lboxctrl.cxx

@@ -17,10 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-
-#ifdef   _TOOLS_DEBUG_HXX
 #include <tools/debug.hxx>
-#endif
 #include <sal/types.h>
 #include <vcl/lstbox.hxx>
 #include <vcl/toolbox.hxx>