[Trivial] [logging] Rm extraneous cleansubver in serveral debug messages.

We log the cleanSubVer as part of connect.  It is not uniquely more informative
 than any of the other data we have about a peer, often less.  It's also often
 long now as well.  There is no need to output it as part of mempoolrej,
 AcceptToMemoryPool, or pong entries.  Leaving it out makes our log entries
 more uniform and consistent.

src/main.cpp

@@ -4254,8 +4254,8 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
             RelayTransaction(tx);
             vWorkQueue.push_back(inv.hash);
 
-            LogPrint("mempool", "AcceptToMemoryPool: peer=%d %s: accepted %s (poolsz %u)\n",
-                pfrom->id, pfrom->cleanSubVer,
+            LogPrint("mempool", "AcceptToMemoryPool: peer=%d: accepted %s (poolsz %u)\n",
+                pfrom->id,
                 tx.GetHash().ToString(),
                 mempool.mapTx.size());
 
@@ -4344,8 +4344,8 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
         int nDoS = 0;
         if (state.IsInvalid(nDoS))
         {
-            LogPrint("mempoolrej", "%s from peer=%d %s was not accepted into the memory pool: %s\n", tx.GetHash().ToString(),
-                pfrom->id, pfrom->cleanSubVer,
+            LogPrint("mempoolrej", "%s from peer=%d was not accepted: %s\n", tx.GetHash().ToString(),
+                pfrom->id,
                 FormatStateMessage(state));
             if (state.GetRejectCode() < REJECT_INTERNAL) // Never send AcceptToMemoryPool's internal codes over P2P
                 pfrom->PushMessage("reject", strCommand, state.GetRejectCode(),
@@ -4546,9 +4546,8 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
         }
 
         if (!(sProblem.empty())) {
-            LogPrint("net", "pong peer=%d %s: %s, %x expected, %x received, %u bytes\n",
+            LogPrint("net", "pong peer=%d: %s, %x expected, %x received, %u bytes\n",
                 pfrom->id,
-                pfrom->cleanSubVer,
                 sProblem,
                 pfrom->nPingNonceSent,
                 nonce,