Remove CWalletTx::vfSpent

Use the spent outpoint multimap to figure out which wallet transaction
outputs are unspent, instead of a vfSpent array that is saved
to disk.

src/rpcdump.cpp

@@ -128,7 +128,6 @@ Value importprivkey(const Array& params, bool fHelp)
 
         if (fRescan) {
             pwalletMain->ScanForWalletTransactions(chainActive.Genesis(), true);
-            pwalletMain->ReacceptWalletTransactions();
         }
     }
 
@@ -216,7 +215,6 @@ Value importwallet(const Array& params, bool fHelp)
 
     LogPrintf("Rescanning last %i blocks\n", chainActive.Height() - pindex->nHeight + 1);
     pwalletMain->ScanForWalletTransactions(pindex);
-    pwalletMain->ReacceptWalletTransactions();
     pwalletMain->MarkDirty();
 
     if (!fGood)