Yesterday afternoon, two new settings were added to the Registration page of organizations. When registrants are not logged in, by default they are asked for identifying information that includes their date of birth and phone number. These new settings allow you to omit either or both of those questions if you desire.
The new settings are found on the Registration > Registration page in the Relaxed Requirements section and replace the use of the little-known extra value NoPhoneEmailOnFind. Read more about these setting here.