Removing ifdef surrounding #include after being cited for portability violation.

Bug #103579

widget/src/qt/nsLookAndFeel.cpp

@@ -38,9 +38,7 @@
 #include "nsLookAndFeel.h"
 #include "nsQApplication.h"
 #include "nsXPLookAndFeel.h"
-#ifdef NS_DEBUG
 #include "nsSize.h"  // needed for nsILookAndFeel's forward declaration
-#endif
 
 #include <qpalette.h>