chore: remove stale TODO comments in slash_validator

[lodekeeper-z]

Remove two TODO(ct) comments about defining electra preset constants that are already defined and in use:

• MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA — defined in preset.zig (both mainnet and minimal)
• WHISTLEBLOWER_REWARD_QUOTIENT_ELECTRA — defined in preset.zig (both mainnet and minimal)

Both constants are already correctly referenced in the switch statements immediately below the TODOs.

🤖 Generated with AI assistance

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on code hygiene by eliminating two outdated TODO comments within the slash_validator function. These comments incorrectly suggested that certain Electra preset constants needed definition, when in fact, they were already properly established and in use within the codebase. The change streamlines the code by removing unnecessary annotations.

Highlights

• Code Cleanup: Removed a stale TODO(ct) comment regarding the definition of MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA, as the constant is already defined and correctly referenced.
• Code Cleanup: Removed a stale TODO(ct) comment regarding the definition of WHISTLEBLOWER_REWARD_QUOTIENT_ELECTRA, as the constant is already defined and correctly referenced.

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[gemini-code-assist]

Code Review

This pull request is a simple cleanup, removing two TODO comments from src/state_transition/block/slash_validator.zig. As the pull request description notes, the constants mentioned in the TODOs (MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA and WHISTLEBLOWER_REWARD_QUOTIENT_ELECTRA) are already defined and used in the code, making the comments obsolete. The change is correct and I have no further suggestions.

[lodekeeper-z]

Superseded by #268, which includes this change plus additional stale TODO cleanups in process_attestation_altair.zig and process_deposit.zig.