refactor(evm): remove unused apply_curie_hard_fork dead code

[panos-xyz]

Summary

• Remove apply_curie_hard_fork and related constants — the function is unreachable in every Morph environment and has been dead code since Morph launched.
• Keep MorphHardfork::Curie, is_curie(), curieBlock chainspec parsing, and the Curie L1-fee formula branch in L1BlockInfo::try_fetch — those are active code paths.

Why it's dead code

Every Morph chain config — mainnet, hoodi, devnet, and l2-genesis-generated configs — sets curieBlock = 0 (semantics: already on Curie). The pre-execution handler guards on:

self.spec
    .morph_fork_activation(MorphHardfork::Curie)   // ForkCondition::Block(0)
    .transitions_at_block(block_number)            // true iff block_number == 0

transitions_at_block(X) returns true only when X == curieBlock == 0. Block 0 is genesis and never flows through BlockExecutor::apply_pre_execution_changes, so the call site is unreachable. The test fixtures that use curieBlock = 200 (crates/chainspec/src/spec.rs:549/607) only exercise ForkCondition parsing and is_curie_active_at_block; they never construct a MorphBlockExecutor and so don't invoke the removed code either.

The L1GasPriceOracle's Curie slots (6/7/8/9) are in fact initialized by the contract owner via a regular transaction after launch — e.g. mainnet block 863 (tx 0x10fab2... from the oracle owner) sets slot 9 via a standard call, which already flows through commit_transaction and the normal state hook. devnet behaves the same way: the genesis generator (ops/l2-genesis/morph-chain-ops/genesis/config.go) only sets slots 0–4, and the Curie slots stay zero until an operator invokes the hardhat gasOracleEnableCurie task.

What's removed

• crates/evm/src/block/curie.rs — the entire file (function + unit test)
• crates/evm/src/block/mod.rs — module declaration, import, and the transition call site
• crates/revm/src/l1block.rs — CURIE_L1_GAS_PRICE_ORACLE_STORAGE plus its INITIAL_*/IS_CURIE inputs and their unit test
• crates/revm/src/lib.rs — the five corresponding re-exports

Test plan

• cargo check --all
• cargo fmt --all -- --check
• cargo clippy --all --all-targets -- -D warnings
• cargo test --all
• cargo test --doc --all
• make test-e2e — 77/77 integration tests passing

Summary by CodeRabbit

• Chores
  • Removed support for the Curie hardfork transition, including the Curie-related gas price oracle initialization and associated public constants and re-exports.
  • Updated advisory checks to ignore a specific advisory warning.
• Tests
  • Removed Curie-related unit tests that validated oracle/storage initialization and transitions.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 4ec18a07-eb42-43f7-a1d3-912454decdbd

📥 Commits

Reviewing files that changed from the base of the PR and between 63db94d and cd6fa69.

⛔ Files ignored due to path filters (1)

• Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (1)

• deny.toml

✅ Files skipped from review due to trivial changes (1)

• deny.toml

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📝 Walkthrough

Walkthrough

This PR removes the Curie hardfork transition implementation and its module declaration, deletes Curie-related constants and re-exports, and updates configuration to silence a specific advisory.

Changes

Cohort / File(s)	Summary
Curie Hardfork Module crates/evm/src/block/curie.rs, crates/evm/src/block/mod.rs	Deleted the Curie transition module and apply_curie_hard_fork function; removed module declaration and the conditional invocation from apply_pre_execution_changes.
Curie Constants & Re-exports crates/revm/src/l1block.rs, crates/revm/src/lib.rs	Removed Curie-related constants (INITIAL_L1_BLOB_BASE_FEE, INITIAL_COMMIT_SCALAR, INITIAL_BLOB_SCALAR, IS_CURIE, CURIE_L1_GAS_PRICE_ORACLE_STORAGE) and their public re-exports.
Configuration deny.toml	Added an ignore rule for advisory RUSTSEC-2026-0105 to suppress the core2 advisory.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Suggested reviewers

• chengwenxi
• anylots

Poem

🐰 I hopped through code with curious cheer,
Curie's traces gently disappear,
Constants tucked away, modules gone,
The tree grows simpler at the dawn. 🥕

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and concisely describes the main change: removal of unused apply_curie_hard_fork dead code. It directly relates to the primary objective of the PR.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/remove-unused-curie-hardfork-code

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