Automatic merge from submit-queue (batch tested with PRs 46394, 46650, 46436, 46673, 46212)
Remove deprecated variable RBACSuperUser
authorization-rbac-super-user is deprecated now. So we can remove
the vaiable. Further more the comment about this variable is wrong.
Remove them also.
**Release note**:
```NONE
```
authorization-rbac-super-user is deprecated now. So we can remove
the vaiable. Further more the comment about this variable is wrong.
Remove them also.