* kubeadm has removed `.Etcd.SelfHosting` from its configuration API. It was never used in practice ([#63871](https://github.com/kubernetes/kubernetes/pull/63871), [@luxas](https://github.com/luxas))
* The deprecated and inactive option '--enable-custom-metrics'  has been removed in 1.11. ([#60699](https://github.com/kubernetes/kubernetes/pull/60699), [@CaoShuFeng](https://github.com/CaoShuFeng))

and will be removed in v1.34. ([#128810](https://github.com/kubernetes/kubernetes/pull/128810), [@googs1025](https://github.com/googs1025))
- kube-apiserver: Inactive serving code is removed for `authentication.k8s.io/v1alpha1` APIs ([#129186](https://github.com/kubernetes/kubernetes/pull/129186), [@liggitt](https://github.com/liggitt)) [SIG Auth and Testing]

- Fix kubelet to not leak goroutines/intofiy watchers on an inactive connection if it's closed ([#67285](https://github.com/kubernetes/kubernetes/pull/67285), [@yujuhong](https://github.com/yujuhong))

    *   Extends the device plugin checkpoint data to record registered resources so that we can finish resource removing devices even upon kubelet restarts.
    *   Passes sourcesReady from kubelet to the device plugin to avoid removing inactive pods during the grace period of kubelet restart.

  - The `--deserialization-cache-size` flag is deprecated, and will be removed in a future release. The flag is inactive since the etcd2 storage backend was removed. ([#69842](https://github.com/kubernetes/kubernetes/pull/69842), [@liggitt](https://github.com/liggitt))