Automatic merge from submit-queue (batch tested with PRs 64597, 67854, 67734, 67917, 67688). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
Remove unused kubelet dependency
**What this PR does / why we need it**:
Cleanup unused `ExternalKubeClient`. I think it's a vestige of when the Kubelet still used the internal types.
**Release note**:
```release-note
NONE
```
/kind cleanup
/sig node
/assign @mtaufen
23bea7240e