Merge bitcoin#9299: Remove no longer needed check for premature v2 txs

b919179 remove no longer needed check for premature v2 txs (Alex Morcos)

Author: laanwj

src/validation.cpp

@@ -590,14 +590,6 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState& state, const C
     if (fRequireStandard && !IsStandardTx(tx, reason))
         return state.DoS(0, false, REJECT_NONSTANDARD, reason);
 
-    // Don't relay version 2 transactions until CSV is active, and we can be
-    // sure that such transactions will be mined (unless we're on
-    // -testnet/-regtest).
-    const CChainParams& chainparams = Params();
-    if (fRequireStandard && tx.nVersion >= 2 && VersionBitsTipState(chainparams.GetConsensus(), Consensus::DEPLOYMENT_CSV) != THRESHOLD_ACTIVE) {
-        return state.DoS(0, false, REJECT_NONSTANDARD, "premature-version2-tx");
-    }
-
     // Only accept nLockTime-using transactions that can be mined in the next
     // block; we don't want our mempool filled up with transactions that can't
     // be mined yet.