Revert "Sc 50139/super admin can export leads with full dob (#157)"

[johnrb2]

After conversations with Scott and Alex; we have decided to keep the dob type as a masked type, and make it optional to use a new standard field called dob secured or something to that effect.

Description of the change

This reverts commit c121836ce2d77d05f4ba25d150c5940980a2f082.

Type of change

• [ ] Bug fix (non-breaking change that fixes an issue)
• [x] New feature (non-breaking change that adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Configuration change
• [ ] Technical Debt
• [ ] Documentation

Related tickets

https://app.shortcut.com/active-prospect/story/50139/super-admin-can-export-leads-with-full-dob

Checklists

Development and Testing

• [x] Lint rules pass locally.
• [x] The code changed/added as part of this pull request has been covered with tests, or this PR does not alter production code.
• [x] All tests related to the changed code pass in development, or tests are not applicable.

Code Review

• [x] This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached.
• [x] At least two engineers have been added as "Reviewers" on the pull request.
• [ ] Changes have been reviewed by at least two other engineers who did not write the code.
• [x] This branch has been rebased off master to be current.

Tracking

• [x] Issue from Shortcut/Jira has a link to this pull request.
• [x] This PR has a link to the issue in Shortcut.

QA

• [x] This branch has been deployed to staging and tested.