Unused Region macro definitions

In other files in vcl/unx/kde4/, those defines are apparently needed to resolve
a clash between class Region from vcl/region.hxx and typedef Region from
/usr/include/QtGui/qwindowdefs.h.  But in these two files those two clashing
headers appear not to be included both, so the define would be flagged by
-Wunused-macros.

Change-Id: Ib5bb62867dd3b3ea4c0a9f4b461efcecd92bc4b7

vcl/unx/kde4/KDEXLib.cxx

@@ -19,8 +19,6 @@
 
 #include "VCLKDEApplication.hxx"
 
-#define Region QtXRegion
-
 #include <kapplication.h>
 #include <klocale.h>
 #include <kaboutdata.h>
@@ -30,8 +28,6 @@
 #include <qclipboard.h>
 #include <qthread.h>
 
-#undef Region
-
 #include "KDEXLib.hxx"
 
 #include <unx/i18n_im.hxx>

vcl/unx/kde4/VCLKDEApplication.cxx

@@ -19,9 +19,7 @@
 
 #include "VCLKDEApplication.hxx"
 
-#define Region QtXRegion
 #include <QEvent>
-#undef Region
 
 #include "KDESalDisplay.hxx"