remove unused variable

src/ASM/DomainDecomposition.C

@@ -1291,7 +1291,6 @@ bool DomainDecomposition::graphPartition(const ProcessAdm& adm, const SIMbase& s
                            &exportToPart);  /* Partition to which each vertex will belong */
 
   if (sim.getProcessAdm().getProcId() == 0) {
-    std::vector<std::vector<int>> toExp(adm.getNoProcs());
     std::vector<bool> offProc(sim.getNoElms(), false);
     for (int i = 0; i < numExport; ++i) {
       int gid = exportGlobalGids[i];