message: [GetTransaction] remove unneeded `cs_main` lock acquire
diff: @@ -125,8 +125,6 @@ TransactionError BroadcastTransaction(NodeContext& node, const CTransactionRef t
  CTransactionRef GetTransaction(const CBlockIndex* const block_index, const CTxMemPool* const mempool, const uint256& hash, const Consensus::Params& consensusParams, uint256& hashBlock)
  {
  - LOCK(cs_main);
  -
  if (mempool && !block_index) {
  CTransactionRef ptx = mempool->get(hash);
  if (ptx) return ptx;
  