[WIP] Remove unused statement in serialization

src/addrdb.h

@@ -48,7 +48,6 @@ public:
     template <typename Stream, typename Operation>
     inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
         READWRITE(this->nVersion);
-        nVersion = this->nVersion;
         READWRITE(nCreateTime);
         READWRITE(nBanUntil);
         READWRITE(banReason);

src/qt/recentrequeststablemodel.h

@@ -31,7 +31,6 @@ public:
         unsigned int nDate = date.toTime_t();
 
         READWRITE(this->nVersion);
-        nVersion = this->nVersion;
         READWRITE(id);
         READWRITE(nDate);
         READWRITE(recipient);

src/qt/walletmodel.h

@@ -75,7 +75,6 @@ public:
         std::string sAuthenticatedMerchant = authenticatedMerchant.toStdString();
 
         READWRITE(this->nVersion);
-        nVersion = this->nVersion;
         READWRITE(sAddress);
         READWRITE(sLabel);
         READWRITE(amount);

src/wallet/wallet.h

@@ -194,7 +194,6 @@ public:
     inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
         std::vector<uint256> vMerkleBranch; // For compatibility with older versions.
         READWRITE(*(CTransaction*)this);
-        nVersion = this->nVersion;
         READWRITE(hashBlock);
         READWRITE(vMerkleBranch);
         READWRITE(nIndex);

src/wallet/walletdb.h

@@ -57,7 +57,6 @@ public:
     inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion)
     {
         READWRITE(this->nVersion);
-        nVersion = this->nVersion;
         READWRITE(nExternalChainCounter);
         READWRITE(masterKeyID);
     }
@@ -96,7 +95,6 @@ public:
     template <typename Stream, typename Operation>
     inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
         READWRITE(this->nVersion);
-        nVersion = this->nVersion;
         READWRITE(nCreateTime);
         if (this->nVersion >= VERSION_WITH_HDDATA)
         {