Remove email and recovery related identity endpoints

[jsdt]

Description of Changes

This removes code for handling emails and identity recovery, since this should move elsewhere.

API and ABI breaking changes

If this is an API or ABI breaking change, please apply the corresponding GitHub label.

Expected complexity level and risk

2. This is not very complex. We are just removing code. The risk here is in missing something that depends on these endpoints.

Testing

This is failing the internal tests, but the internal cargo tests pass with this PR.

[cloutiertyler]

This generally looks good to me. It's correct, although it will need a corresponding internal PR.