Get rid of BindWallet

CWalletTx initialization has been fixed so it's no longer necessary to change
which wallet a transaction is bound to.

src/wallet/wallet.cpp

@@ -806,7 +806,6 @@ CWalletTx* CWallet::AddToWallet(CTransactionRef tx, const CWalletTx::Confirmatio
     // Inserts only if not already there, returns tx inserted or tx found
     auto ret = mapWallet.emplace(std::piecewise_construct, std::forward_as_tuple(hash), std::forward_as_tuple(this, tx));
     CWalletTx& wtx = (*ret.first).second;
-    wtx.BindWallet(this);
     bool fInsertedNew = ret.second;
     bool fUpdated = update_wtx && update_wtx(wtx, fInsertedNew);
     if (fInsertedNew) {
@@ -3018,7 +3017,7 @@ void CWallet::CommitTransaction(CTransactionRef tx, mapValue_t mapValue, std::ve
     // Notify that old coins are spent
     for (const CTxIn& txin : tx->vin) {
         CWalletTx &coin = mapWallet.at(txin.prevout.hash);
-        coin.BindWallet(this);
+        coin.MarkDirty();
         NotifyTransactionChanged(this, coin.GetHash(), CT_UPDATED);
     }
 

src/wallet/wallet.h

@@ -463,12 +463,6 @@ class CWalletTx
         m_is_cache_empty = true;
     }
 
-    void BindWallet(CWallet *pwalletIn)
-    {
-        pwallet = pwalletIn;
-        MarkDirty();
-    }
-
     //! filter decides which addresses will count towards the debit
     CAmount GetDebit(const isminefilter& filter) const;
     CAmount GetCredit(const isminefilter& filter) const;