Unassign Mastery Profiles from an individual User. Unassigning a Mastery Profile removes all access to the Mastery Profile content. Once a Mastery Profile is unassigned, the User will no longer recieve any activities from the removed Mastery Profile during a Mastery Moment. Multiple Mastery Profiles can be unassigned with a single request by passing multiple Id's to the 'masteryProfileIds' array. To assign a Mastery Profile to a User, refer to the assign User Mastery Profiles request. After unassigng Mastery Profiles, the response will contain the updated list of assigned Mastery Profiles for the User.