[refactor] remove access to mapTx in validation.cpp

src/validation.cpp

@@ -353,7 +353,7 @@ void Chainstate::MaybeUpdateMempoolForReorg(
             const std::optional<LockPoints> new_lock_points{CalculateLockPointsAtTip(m_chain.Tip(), view_mempool, tx)};
             if (new_lock_points.has_value() && CheckSequenceLocksAtTip(m_chain.Tip(), *new_lock_points)) {
                 // Now update the mempool entry lockpoints as well.
-                m_mempool->mapTx.modify(it, [&new_lock_points](CTxMemPoolEntry& e) { e.UpdateLockPoints(*new_lock_points); });
+                it->UpdateLockPoints(*new_lock_points);
             } else {
                 return true;
             }