Remove unused appointments feature toggles - 2

[JunTaoLuo]

Summary

• Removing some of the obsolete feature toggles for features that have been fully released.
• Appointments tools team
• This PR should be merged after Remove unused appointments feature toggles - 2 vets-website#35106 is merged.

Related issue(s)

• VAOS feature toggle cleanup - part 2 va.gov-team#103685

Testing done

• New code is covered by unit tests ensured existing tests pass

Screenshots

N/A

What areas of the site does it impact?

Appointments tools

Acceptance criteria

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No error nor warning in the console.
• Events are being sent to the appropriate logging solution
• Documentation has been updated (link to documentation) Will update documentation after PRs are merged and feature toggles fully deleted from Flipper
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Feature/bug has a monitor built into Datadog (if applicable)
• If app impacted requires authentication, did you login to a local build and verify all authenticated routes work as expected
• I added a screenshot of the developed feature