ProcessOrphanTx: Remove aliases

Summary:
This is a backport of core#19498 [5/5]
https://github.com/bitcoin/bitcoin/pull/19498/commits/4fce726bd1e35a686cd9d48add5da22b1b5e25e1

Depends on D10415

Test Plan: ninja all check-all

Reviewers: #bitcoin_abc, majcosta

Reviewed By: #bitcoin_abc, majcosta

Subscribers: majcosta

Differential Revision: https://reviews.bitcoinabc.org/D10416