feat: remove vetting features

[nicholaschiang]

Fixes TB-155

[linear]

TB-155 Remove "vetting" features

Drop the verifications table, data models, etc. from our code-base as they're not being used by anyone and they aren't even functional right now (because we're not saving anything into the verifications table anyways).

[vercel]

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🔍 Inspect: https://vercel.com/tutorbook/tutorbook/96m8iifwghf67b5Vg8FVyQKwNCq4
✅ Preview: https://tutorbook-git-vetting-tutorbook.vercel.app

[nicholaschiang]

📝 Changed routes:

/[org]/users/[id]/vet
(view full size)

And 1 other route:

• /api/account

Commit 286403d (https://tutorbook-8evbmlujf-tutorbook.vercel.app).