p2p: Remove dead code for nVersion=10300

src/net_processing.cpp

@@ -1662,8 +1662,7 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr
             return false;
         }
 
-        if (nVersion < MIN_PEER_PROTO_VERSION)
-        {
+        if (nVersion < MIN_PEER_PROTO_VERSION) {
             // disconnect from peers older than this proto version
             LogPrint(BCLog::NET, "peer=%d using obsolete version %i; disconnecting\n", pfrom->GetId(), nVersion);
             if (enable_bip61) {
@@ -1674,8 +1673,6 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr
             return false;
         }
 
-        if (nVersion == 10300)
-            nVersion = 300;
         if (!vRecv.empty())
             vRecv >> addrFrom >> nNonce;
         if (!vRecv.empty()) {

test/functional/test_framework/messages.py

@@ -904,8 +904,6 @@ class msg_version():
 
     def deserialize(self, f):
         self.nVersion = struct.unpack("<i", f.read(4))[0]
-        if self.nVersion == 10300:
-            self.nVersion = 300
         self.nServices = struct.unpack("<Q", f.read(8))[0]
         self.nTime = struct.unpack("<q", f.read(8))[0]
         self.addrTo = CAddress()