NEW YORK — Unvaccinated players on the Yankees and Mets are covered by the same private sector employer mandate that is keeping Kyrie Irving off the court in Brooklyn, a City Hall spokesperson told the New York Daily News. Mayor Eric Adams repealed the Key2NYC vaccine mandate covering indoor spaces like gyms, dining and entertainment on Mar. 7. But Irving remained ineligible to play under a separate regulation: A private employer mandate put in place by the former mayor Bill de Blasio’s administration on Dec. 27. The spokesperson cautioned that mandates could shift with the state of the pandem…