public TargetAssignmentBuilder<T> removeMember(
        String memberId
    ) {
        return addOrUpdateMember(memberId, null);
    }
Removes a member. This is useful when the removed member
is not yet materialized in memory.

@param memberId The member id.
@return This object.
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/modern/TargetAssignmentBuilder.java