Automatic merge from submit-queue
Prune reviewers from pkg/cloudprovider
**What this PR does / why we need it**
Per discussion in https://github.com/kubernetes/kubernetes/pull/36530 the `OWNERS` file for `pkg/cloudprovider` should not contain additional reviewers at this time.
**Special notes for your reviewer**:
Sorry for the extra work in review
**Release note**:
`NONE`