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remove duplicate function getBuggyHostportChain
**What this PR does / why we need it**:
remove `TODO remove this after release 1.9, please refer https://github.com/kubernetes/kubernetes/pull/55153`
function `getBuggyHostportChain` does bad conversion on HostPort from int32 to string, now that `getHostportChain` does right, we remove function `getBuggyHostportChain` .
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
57888103a5