Remove error segment code

[SpennyNDaJets]

Summary

Now that error search and segments have been migrated and working for the past month, we can clean up the legacy error segment code.

How did you test this change?

• Error search still works
• Saved error segments still work

Are there any deployment considerations?

Harder to revert error experience

Does this work require review from our design team?

N/A

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Latest commit: 1be9502

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[mayberryzane]

🙌