Administrators in admissions handle diversity and inclusion for students. Whoever is already in charge of hiring faculty/staff should also be handling diversity and inclusion there as well.
I get that specialists are needed at times, and having one person (or group of persons) can help in getting a singular focus and consistent strategy. But there's nothing wrong with people wearing multiple hats in a job and communicating with peers as they do so.
There also can't be a discussion of which adminstrators to let go until we are talking about specifics. Each University will have different circumstances, priorities, problems and budgets, and each individual adminstrator will have their own skills, expertises, and abilities to handle certain workloads. What changes Harvard would make are going to be different than the changes Notre Dame would make. That's why you can't have those specific "which administrators" conversations. It's not because we can't decide whether to cut administrators in charge of diversity or administrators in charge of athletics. Any given administrator can have multiple roles. They don't need to specialize in one. Which grouping of roles occurs will be determined by a very specific set of circumstances for a given University and its people, which is going to depend on knowledge that neither you nor I have.