Deprecate and remove refs to TheChecker #2238

Ticket(s) / Related Merge Requests

Closes #2238 (closed)

Summary of Changes

Deprecates TheChecker, which previously checked emails were valid and deliverable.

Testing Considerations

Need to test registration still functions fine. Changes are very minor if you look at them - should affect much.

Regression Scope

Registration.

Platform Affected (web, mobile, etc)

Engine (web and mobile)

Developer Testing Completed

N/A

Screenshots

(Any extra UI screens that can be shared)

Does this impact

• Localization
• Dark/light mode
• Guest mode