net: remove redundant max sendbuffer size check

This is left-over from before there was proper accounting. Hitting 2x the
sendbuffer size should not be possible.

src/net_processing.cpp

@@ -1059,8 +1059,6 @@ uint32_t GetFetchFlags(CNode* pfrom, CBlockIndex* pprev, const Consensus::Params
 
 bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv, int64_t nTimeReceived, const CChainParams& chainparams, CConnman& connman, std::atomic<bool>& interruptMsgProc)
 {
-    unsigned int nMaxSendBufferSize = connman.GetSendBufferSize();
-
     LogPrint("net", "received: %s (%u bytes) peer=%d\n", SanitizeString(strCommand), vRecv.size(), pfrom->id);
     if (IsArgSet("-dropmessagestest") && GetRand(GetArg("-dropmessagestest", 0)) == 0)
     {
@@ -1413,11 +1411,6 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
 
             // Track requests for our stuff
             GetMainSignals().Inventory(inv.hash);
-
-            if (pfrom->nSendSize > (nMaxSendBufferSize * 2)) {
-                Misbehaving(pfrom->GetId(), 50);
-                return error("send buffer size() = %u", pfrom->nSendSize);
-            }
         }
 
         if (!vToFetch.empty())