remove email validation from the north star benchmark

[davidhewitt]

Change Summary

Removes the email field from the "north star" benchmark. The email validation is implemented in pure python and is a very complex problem, so performs significantly slower than the rest of pydantic's validation. (Approx 75% of the time was spent in email validation.)

Removing it gives us a truer measurement on the performance of pydantic's internals.

Related issue number

N/A

Checklist

• The pull request title is a good summary of the changes - it will be used in the changelog
• Unit tests for the changes exist
• Tests pass on CI
• Documentation reflects the changes where applicable
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

Selected Reviewer: @lig

[davidhewitt]

please review