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/wallet/wallet.cpp

@@ -1532,45 +1532,6 @@ 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 (!hashUnset())
-            {
-                std::map<uint256, int>::const_iterator mi = pwallet->mapRequestCount.find(hashBlock);
-                if (mi != pwallet->mapRequestCount.end())
-                    nRequests = (*mi).second;
-            }
-        }
-        else
-        {
-            // Did anyone request this transaction?
-            std::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 && !hashUnset())
-                {
-                    std::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;
-}
-
 // Helper for producing a max-sized low-S signature (eg 72 bytes)
 bool CWallet::DummySignInput(CTxIn &tx_in, const CTxOut &txout) const
 {
@@ -3145,9 +3106,6 @@ bool CWallet::CommitTransaction(CTransactionRef tx, mapValue_t mapValue, std::ve
             }
         }
 
-        // Track how many getdata requests our transaction gets
-        mapRequestCount[wtxNew.GetHash()] = 0;
-
         // Get the inserted-CWalletTx from mapWallet so that the
         // fInMempool flag is cached properly
         CWalletTx& wtx = mapWallet.at(wtxNew.GetHash());