diff --git a/kv/transaction/mvcc/lock.go b/kv/transaction/mvcc/lock.go
index 691a16e9..0a88299c 100644
--- a/kv/transaction/mvcc/lock.go
+++ b/kv/transaction/mvcc/lock.go
@@ -96,13 +96,3 @@ func AllLocksForTxn(txn *MvccTxn) ([]KlPair, error) {
 	}
 	return result, nil
 }
-
-func LockedError(info ...kvrpcpb.LockInfo) []*kvrpcpb.KeyError {
-	var result []*kvrpcpb.KeyError
-	for _, i := range info {
-		var ke kvrpcpb.KeyError
-		ke.Locked = &i
-		result = append(result, &ke)
-	}
-	return result
-}