Remove useless mapRequest tracking that just effects Qt display.

I thought we had removed this a long time ago, TBH, its really
confusing feedback to users that we display whether a tx was
broadcast to immediate neighbor nodes, given that has little
indication of whether the tx propagated very far.

src/main.cpp

@@ -6395,9 +6395,6 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
                 }
             }
 
-            // Track requests for our stuff.
-            GetMainSignals().Inventory(inv.hash);
-
             if (inv.type == MSG_BLOCK || inv.type == MSG_FILTERED_BLOCK)
                 break;
         }
@@ -6764,9 +6761,6 @@ bool static ProcessMessage(const CChainParams& chainparams, CNode* pfrom, string
                     pfrom->AskFor(inv);
             }
 
-            // Track requests for our stuff
-            GetMainSignals().Inventory(inv.hash);
-
             if (pfrom->nSendSize > (SendBufferSize() * 2)) {
                 Misbehaving(pfrom->GetId(), 50);
                 return error("send buffer size() = %u", pfrom->nSendSize);

src/validationinterface.cpp

@@ -37,7 +37,6 @@ void RegisterValidationInterface(CValidationInterface* pwalletIn) {
     g_signals.EraseTransaction.connect(boost::bind(&CValidationInterface::EraseFromWallet, pwalletIn, _1));
     g_signals.UpdatedTransaction.connect(boost::bind(&CValidationInterface::UpdatedTransaction, pwalletIn, _1));
     g_signals.ChainTip.connect(boost::bind(&CValidationInterface::ChainTip, pwalletIn, _1, _2, _3));
-    g_signals.Inventory.connect(boost::bind(&CValidationInterface::Inventory, pwalletIn, _1));
     g_signals.Broadcast.connect(boost::bind(&CValidationInterface::ResendWalletTransactions, pwalletIn, _1));
     g_signals.BlockChecked.connect(boost::bind(&CValidationInterface::BlockChecked, pwalletIn, _1, _2));
     g_signals.AddressForMining.connect(boost::bind(&CValidationInterface::GetAddressForMining, pwalletIn, _1));
@@ -49,7 +48,6 @@ void UnregisterValidationInterface(CValidationInterface* pwalletIn) {
     g_signals.AddressForMining.disconnect(boost::bind(&CValidationInterface::GetAddressForMining, pwalletIn, _1));
     g_signals.BlockChecked.disconnect(boost::bind(&CValidationInterface::BlockChecked, pwalletIn, _1, _2));
     g_signals.Broadcast.disconnect(boost::bind(&CValidationInterface::ResendWalletTransactions, pwalletIn, _1));
-    g_signals.Inventory.disconnect(boost::bind(&CValidationInterface::Inventory, pwalletIn, _1));
     g_signals.ChainTip.disconnect(boost::bind(&CValidationInterface::ChainTip, pwalletIn, _1, _2, _3));
     g_signals.UpdatedTransaction.disconnect(boost::bind(&CValidationInterface::UpdatedTransaction, pwalletIn, _1));
     g_signals.EraseTransaction.disconnect(boost::bind(&CValidationInterface::EraseFromWallet, pwalletIn, _1));
@@ -63,7 +61,6 @@ void UnregisterAllValidationInterfaces() {
     g_signals.AddressForMining.disconnect_all_slots();
     g_signals.BlockChecked.disconnect_all_slots();
     g_signals.Broadcast.disconnect_all_slots();
-    g_signals.Inventory.disconnect_all_slots();
     g_signals.ChainTip.disconnect_all_slots();
     g_signals.UpdatedTransaction.disconnect_all_slots();
     g_signals.EraseTransaction.disconnect_all_slots();

src/validationinterface.h

@@ -92,7 +92,6 @@ protected:
     virtual void EraseFromWallet(const uint256 &hash) {}
     virtual void ChainTip(const CBlockIndex *pindex, const CBlock *pblock, std::optional<MerkleFrontiers> added) {}
     virtual void UpdatedTransaction(const uint256 &hash) {}
-    virtual void Inventory(const uint256 &hash) {}
     virtual void ResendWalletTransactions(int64_t nBestBlockTime) {}
     virtual void BlockChecked(const CBlock&, const CValidationState&) {}
     virtual void GetAddressForMining(std::optional<MinerAddress>&) {};
@@ -160,8 +159,6 @@ struct CMainSignals {
     boost::signals2::signal<void (const uint256 &)> UpdatedTransaction;
     /** Notifies listeners of a change to the tip of the active block chain. */
     boost::signals2::signal<void (const CBlockIndex *, const CBlock *, std::optional<MerkleFrontiers>)> ChainTip;
-    /** Notifies listeners about an inventory item being seen on the network. */
-    boost::signals2::signal<void (const uint256 &)> Inventory;
     /** Tells listeners to broadcast their data. */
     boost::signals2::signal<void (int64_t nBestBlockTime)> Broadcast;
     /** Notifies listeners of a block validation result */

src/wallet/wallet.cpp

@@ -4455,45 +4455,6 @@ int64_t CWalletTx::GetTxTime() const
     return n ? n : nTimeReceived;
 }
 
-int CWalletTx::GetRequestCount() const
-{
-    // Returns -1 if it wasn't being tracked
-    int nRequests = -1;
-    {
-        LOCK(pwallet->cs_wallet);
-        if (IsCoinBase())
-        {
-            // Generated block
-            if (!hashBlock.IsNull())
-            {
-                map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
-                if (mi != pwallet->mapRequestCount.end())
-                    nRequests = (*mi).second;
-            }
-        }
-        else
-        {
-            // Did anyone request this transaction?
-            map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(GetHash());
-            if (mi != pwallet->mapRequestCount.end())
-            {
-                nRequests = (*mi).second;
-
-                // How about the block it's in?
-                if (nRequests == 0 && !hashBlock.IsNull())
-                {
-                    map<uint256, int>::const_iterator _mi = pwallet->mapRequestCount.find(hashBlock);
-                    if (_mi != pwallet->mapRequestCount.end())
-                        nRequests = (*_mi).second;
-                    else
-                        nRequests = 1; // If it's in someone else's block it must have got out
-                }
-            }
-        }
-    }
-    return nRequests;
-}
-
 // GetAmounts will determine the transparent debits and credits for a given wallet tx.
 void CWalletTx::GetAmounts(std::list<COutputEntry>& listReceived,
                            std::list<COutputEntry>& listSent, CAmount& nFee, const isminefilter& filter) const
@@ -5914,9 +5875,6 @@ bool CWallet::CommitTransaction(CWalletTx& wtxNew, std::optional<std::reference_
                 delete pwalletdb;
         }
 
-        // Track how many getdata requests our transaction gets
-        mapRequestCount[wtxNew.GetHash()] = 0;
-
         if (fBroadcastTransactions)
         {
             // Broadcast

src/wallet/wallet.h

@@ -691,7 +691,6 @@ public:
     bool IsTrusted(const std::optional<int>& asOfHeight) const;
 
     int64_t GetTxTime() const;
-    int GetRequestCount() const;
 
     bool RelayWalletTransaction();
 
@@ -1416,7 +1415,6 @@ public:
     TxItems wtxOrdered;
 
     int64_t nOrderPosNext;
-    std::map<uint256, int> mapRequestCount;
 
     std::map<CTxDestination, CAddressBookData> mapAddressBook;
 
@@ -1971,16 +1969,6 @@ public:
 
     void UpdatedTransaction(const uint256 &hashTx);
 
-    void Inventory(const uint256 &hash)
-    {
-        {
-            LOCK(cs_wallet);
-            std::map<uint256, int>::iterator mi = mapRequestCount.find(hash);
-            if (mi != mapRequestCount.end())
-                (*mi).second++;
-        }
-    }
-
     void GetAddressForMining(std::optional<MinerAddress> &minerAddress);
     void ResetRequestCount(const uint256 &hash)
     {