chore: drop dead legacy oracle mappings

[benesjan]

Dropping unused legacy oracle mappings.

I think the first 2 below got in because SponsoredFPC used to be pinned and then it was unpinned. Not sure about utilityEmitOffchainEffect but it's not in any pinned contract bytecode (the bytecode contains full source code).

The backport PR is here - created the backport manually as I wanted to see if tests actually pass on v4-next. So if you approve this one please approve the backport as well.

Summary

• Remove 3 legacy oracle mappings that are not called by any pinned v4 protocol contract:
  • privateIsSideEffectCounterRevertible
  • privateNotifySetPublicTeardownFunctionCall
  • utilityEmitOffchainEffect
• Verified by decoding the Brillig bytecode from the pinned protocol contract artifacts on v4-next — none of these oracle names appear in any of the 6 pinned contracts.

Test plan

• CI passes (no functional change — these mappings were dead code)

🤖 Generated with Claude Code

[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/108bb31b07816c65�108bb31b07816c658;;�):  yarn-project/end-to-end/scripts/run_test.sh simple src/e2e_offchain_payment.test.ts (57s) (code: 0)
\033FLAKED\033 (8;;http://ci.aztec-labs.com/1913ae1c5bfc2af5�1913ae1c5bfc2af58;;�):  yarn-project/end-to-end/scripts/run_test.sh simple src/e2e_epochs/epochs_invalidate_block.parallel.test.ts "proposer invalidates multiple checkpoints" (348s) (code: 0) group:e2e-p2p-epoch-flakes