Remove unused code from wallet and validation interface

Fixes #6109

Author: fanquake

src/validationinterface.cpp

@@ -14,7 +14,6 @@ CMainSignals& GetMainSignals()
 
 void RegisterValidationInterface(CValidationInterface* pwalletIn) {
     g_signals.SyncTransaction.connect(boost::bind(&CValidationInterface::SyncTransaction, pwalletIn, _1, _2));
-    g_signals.EraseTransaction.connect(boost::bind(&CValidationInterface::EraseFromWallet, pwalletIn, _1));
     g_signals.UpdatedTransaction.connect(boost::bind(&CValidationInterface::UpdatedTransaction, pwalletIn, _1));
     g_signals.SetBestChain.connect(boost::bind(&CValidationInterface::SetBestChain, pwalletIn, _1));
     g_signals.Inventory.connect(boost::bind(&CValidationInterface::Inventory, pwalletIn, _1));
@@ -28,7 +27,6 @@ void UnregisterValidationInterface(CValidationInterface* pwalletIn) {
     g_signals.Inventory.disconnect(boost::bind(&CValidationInterface::Inventory, pwalletIn, _1));
     g_signals.SetBestChain.disconnect(boost::bind(&CValidationInterface::SetBestChain, pwalletIn, _1));
     g_signals.UpdatedTransaction.disconnect(boost::bind(&CValidationInterface::UpdatedTransaction, pwalletIn, _1));
-    g_signals.EraseTransaction.disconnect(boost::bind(&CValidationInterface::EraseFromWallet, pwalletIn, _1));
     g_signals.SyncTransaction.disconnect(boost::bind(&CValidationInterface::SyncTransaction, pwalletIn, _1, _2));
 }
 
@@ -38,7 +36,6 @@ void UnregisterAllValidationInterfaces() {
     g_signals.Inventory.disconnect_all_slots();
     g_signals.SetBestChain.disconnect_all_slots();
     g_signals.UpdatedTransaction.disconnect_all_slots();
-    g_signals.EraseTransaction.disconnect_all_slots();
     g_signals.SyncTransaction.disconnect_all_slots();
 }
 

src/validationinterface.h

@@ -29,7 +29,6 @@ void SyncWithWallets(const CTransaction& tx, const CBlock* pblock = NULL);
 class CValidationInterface {
 protected:
     virtual void SyncTransaction(const CTransaction &tx, const CBlock *pblock) {}
-    virtual void EraseFromWallet(const uint256 &hash) {}
     virtual void SetBestChain(const CBlockLocator &locator) {}
     virtual void UpdatedTransaction(const uint256 &hash) {}
     virtual void Inventory(const uint256 &hash) {}
@@ -43,8 +42,6 @@ class CValidationInterface {
 struct CMainSignals {
     /** Notifies listeners of updated transaction data (transaction, and optionally the block it is found in. */
     boost::signals2::signal<void (const CTransaction &, const CBlock *)> SyncTransaction;
-    /** Notifies listeners of an erased transaction (currently disabled, requires transaction replacement). */
-    boost::signals2::signal<void (const uint256 &)> EraseTransaction;
     /** Notifies listeners of an updated transaction without new data (for now: a coinbase potentially becoming visible). */
     boost::signals2::signal<void (const uint256 &)> UpdatedTransaction;
     /** Notifies listeners of a new active block chain. */

src/wallet/wallet.cpp

@@ -775,18 +775,6 @@ void CWallet::SyncTransaction(const CTransaction& tx, const CBlock* pblock)
     }
 }
 
-void CWallet::EraseFromWallet(const uint256 &hash)
-{
-    if (!fFileBacked)
-        return;
-    {
-        LOCK(cs_wallet);
-        if (mapWallet.erase(hash))
-            CWalletDB(strWalletFile).EraseTx(hash);
-    }
-    return;
-}
-
 
 isminetype CWallet::IsMine(const CTxIn &txin) const
 {

src/wallet/wallet.h

@@ -615,7 +615,6 @@ class CWallet : public CCryptoKeyStore, public CValidationInterface
     bool AddToWallet(const CWalletTx& wtxIn, bool fFromLoadWallet, CWalletDB* pwalletdb);
     void SyncTransaction(const CTransaction& tx, const CBlock* pblock);
     bool AddToWalletIfInvolvingMe(const CTransaction& tx, const CBlock* pblock, bool fUpdate);
-    void EraseFromWallet(const uint256 &hash);
     int ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate = false);
     void ReacceptWalletTransactions();
     void ResendWalletTransactions(int64_t nBestBlockTime);