chore: drop ISDLOCK_PROTO_VERSION checks

Author: kwvg

src/net_processing.cpp

@@ -3525,9 +3525,9 @@ void PeerManagerImpl::PostProcessMessage(MessageProcessingResult&& result, NodeI
     if (result.m_inv_filter) {
         const auto& [inv, filter] = result.m_inv_filter.value();
         if (std::holds_alternative<CTransactionRef>(filter)) {
-            RelayInvFiltered(inv, *std::get<CTransactionRef>(filter), ISDLOCK_PROTO_VERSION);
+            RelayInvFiltered(inv, *std::get<CTransactionRef>(filter));
         } else if (std::holds_alternative<uint256>(filter)) {
-            RelayInvFiltered(inv, std::get<uint256>(filter), ISDLOCK_PROTO_VERSION);
+            RelayInvFiltered(inv, std::get<uint256>(filter));
         } else {
             assert(false);
         }
@@ -6211,7 +6211,6 @@ bool PeerManagerImpl::SendMessages(CNode* pto)
 
                     const auto islock = m_llmq_ctx->isman->GetInstantSendLockByTxid(hash);
                     if (islock == nullptr) continue;
-                    if (pto->nVersion < ISDLOCK_PROTO_VERSION) continue;
                     uint256 isLockHash{::SerializeHash(*islock)};
                     tx_relay->m_tx_inventory_known_filter.insert(isLockHash);
                     queueAndMaybePushInv(CInv(MSG_ISDLOCK, isLockHash));

src/version.h

@@ -22,9 +22,6 @@ static const int MIN_PEER_PROTO_VERSION = 70221;
 //! minimum proto version of masternode to accept in DKGs
 static const int MIN_MASTERNODE_PROTO_VERSION = 70238;
 
-//! introduction of instant send deterministic lock (ISDLOCK)
-static const int ISDLOCK_PROTO_VERSION = 70220;
-
 //! GOVSCRIPT was activated in this version
 static const int GOVSCRIPT_PROTO_VERSION = 70221;