Automatic merge from submit-queue (batch tested with PRs 54379, 56593, 56685, 54174, 57309). 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 useless function hasHostPortConflicts

`hasHostPortConflicts` is not used anywhere. Delete it.


**Release note**:
```release-note
NONE
```