Removed define to prevent warning.

[[Imported from SVN: r1393]]

dune/istl/test/scaledidmatrixtest.cc

 // -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 // vi: set et ts=4 sw=2 sts=2:
 #include "config.h"
-#define DUNE_ISTL_WITH_CHECKING
 
 // include this first to see whether it includes all necessary headers itself
 #include <dune/istl/scaledidmatrix.hh>