refactor: remove unnecessary copying of unvalidated read request

[LeilaWang]

We copied the first unvalidated read request to the output just for some tests. Which is confusing and unnecessary and is now removed.

[AztecBot]

Flakey Tests

🤖 says: This CI run detected 2 tests that failed, but were tolerated due to a .test_patterns.yml entry.

\033FLAKED\033 (8;;http://ci.aztec-labs.com/27bb643c76971786�27bb643c769717868;;�):  yarn-project/end-to-end/scripts/run_test.sh simple src/e2e_p2p/valid_epoch_pruned_slash.test.ts (396s) (code: 1) group:e2e-p2p-epoch-flakes (\033Leila Wang\033: refactor: remove unnecessary copying of unvalidated read request (#19908))
\033FLAKED\033 (8;;http://ci.aztec-labs.com/4d0439e4b8361ebe�4d0439e4b8361ebe8;;�): ./boxes/scripts/run_test.sh vite chromium (601s) (code: 124) (\033Leila Wang\033: refactor: remove unnecessary copying of unvalidated read request (#19908))