remove unused variable 'cellBB'

apps/benchmarks/ComplexGeometryList/ComplexGeometryList.cpp

@@ -276,7 +276,6 @@ int main( int argc, char **argv )
     // Test Stability Chacker
 
     for (auto &block : *blocks) {
-        CellInterval cellBB = blocks->getBlockCellBB(block);
        MyList *lbmList = block.getData<MyList>(pdfListId);
         if( !lbmList->getFluidCells().empty() ) {
             Cell firstCell = lbmList->getFluidCells().front();