def remove_all_instructors(course_key):
"""
Removes all instructor and staff users from the given course.
"""
staff_role = CourseStaffRole(course_key)
staff_role.remove_users(*staff_role.users_with_role())
instructor_role = CourseInstructorRole(course_key)
instructor_role.remove_users(*instructor_role.users_with_role())
