Docs IA 2.0: Delete Error Handling page

[delbaoliveira]

The content has already been migrated to https://nextjs.org/docs/app/getting-started/error-handling.

Closes: https://linear.app/vercel/issue/DOC-4700/bya-delete-error-handling-page
Redirects: https://github.com/vercel/front/pull/46127

[changeset-bot]

⚠️ No Changeset found

Latest commit: 4173aa0

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions]

All broken links are now fixed, thank you!