diff --git a/src/validation.cpp b/src/validation.cpp
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -2353,24 +2353,13 @@
 struct PerBlockConnectTrace {
     CBlockIndex *pindex = nullptr;
     std::shared_ptr<const CBlock> pblock;
-    std::shared_ptr<std::vector<CTransactionRef>> conflictedTxs;
-    PerBlockConnectTrace()
-        : conflictedTxs(std::make_shared<std::vector<CTransactionRef>>()) {}
+    PerBlockConnectTrace() {}
 };
 
 /**
  * Used to track blocks whose transactions were applied to the UTXO state as a
  * part of a single ActivateBestChainStep call.
  *
- * This class also tracks transactions that are removed from the mempool as
- * conflicts (per block) and can be used to pass all those transactions through
- * SyncTransaction.
- *
- * This class assumes (and asserts) that the conflicted transactions for a given
- * block are added via mempool callbacks prior to the BlockConnected()
- * associated with those transactions. If any transactions are marked
- * conflicted, it is assumed that an associated block will always be added.
- *
  * This class is single-use, once you call GetBlocksConnected() you have to
  * throw it away and make a new one.
  */
@@ -2404,7 +2393,6 @@
         // transactions from the next block. We pop the last entry here to make
         // sure the list we return is sane.
         assert(!blocksConnected.back().pindex);
-        assert(blocksConnected.back().conflictedTxs->empty());
         blocksConnected.pop_back();
         return blocksConnected;
     }
@@ -2412,10 +2400,6 @@
     void NotifyEntryRemoved(CTransactionRef txRemoved,
                             MemPoolRemovalReason reason) {
         assert(!blocksConnected.back().pindex);
-        if (reason == MemPoolRemovalReason::CONFLICT) {
-            blocksConnected.back().conflictedTxs->emplace_back(
-                std::move(txRemoved));
-        }
     }
 };