Implement delete mfa/authenticators endpoint

[czf]

Checklist

• [X] I have looked into the Readme and have not found a suitable solution or answer.
• [X] I have looked into the API documentation and have not found a suitable solution or answer.
• [X] I have searched the issues and have not found a suitable solution or answer.
• [X] I have searched the Auth0 Community forums and have not found a suitable solution or answer.
• [X] I agree to the terms within the Auth0 Code of Conduct.

Describe the problem you'd like to have solved

the authentication client doesn't support deleting authenticators.

Describe the ideal solution

the authentication client supports deleting authenticators.

Alternatives and current workarounds

No response

Additional context

No response