6efdc940e8
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 unused getClusterCIDR() **What this PR does / why we need it**: getClusterCIDR() has been unused since the PR 57305[1], so this removes the method for code cleanup. [1]: https://github.com/kubernetes/kubernetes/pull/57305 **Release note**: "NONE"