Automatic merge from submit-queue. 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 controller-manager --service-sync-period flag
**What this PR does / why we need it**:
This PR removes controller manager --service-sync-period flag which is not used anywhere in the code and is causing confusion
**Which issue(s) this PR fixes**
https://github.com/kubernetes/kubernetes/issues/58776
**Special notes for your reviewer**:
@deads2k this remove the flag as per the discussion on #58776
2 commits
1. one for code change
2. one for auto generated code
**Release note**:
```release-note
1. Controller-manager --service-sync-period flag is removed (was never used in the code).
```
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