🧹 Remove unused _review_key function and sorting step

[edithatogo]

🎯 What: Removed the unused _review_key function and the sorting steps that depended on it in generate_report.
💡 Why: The sorting logic was deemed unnecessary, and removing it simplifies the code and removes dead code, improving overall code health and readability.
✅ Verification: Ran the full test suite (make test), and all tests passed.
✨ Result: Improved maintainability by removing unused code.

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PR created automatically by Jules for task 8143774939833836909 started by @edithatogo

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