- Official support to build kubernetes with docker-machine / remote docker is removed. This change does not affect building kubernetes with docker locally. ([#97935](https://github.com/kubernetes/kubernetes/pull/97935), [@adeniyistephen](https://github.com/adeniyistephen)) [SIG Release and Testing]
- Remove deprecated `--generator, --replicas, --service-generator, --service-overrides, --schedule` from `kubectl run`

* You can now display requests/limits of extended resources in node allocated resources. ([#46079](https://github.com/kubernetes/kubernetes/pull/46079), [@xiangpengzhao](https://github.com/xiangpengzhao))
* The `--remove-extra-subjects` and `--remove-extra-permissions` flags have been enabled for `kubectl auth reconcile` ([#64541](https://github.com/kubernetes/kubernetes/pull/64541), [@mrogers950](https://github.com/mrogers950))

- Remove `kubernetes.io/grpc` standard appProtocol ([#116866](https://github.com/kubernetes/kubernetes/pull/116866), [@LiorLieberman](https://github.com/LiorLieberman)) [SIG API Machinery and Apps]

    * Remove deprecated ContainerVM support from GCE kube-up.  ([#58247](https://github.com/kubernetes/kubernetes/pull/58247), [@mikedanese](https://github.com/mikedanese))

    * Remove deprecated kube-push.sh functionality.  ([#58246](https://github.com/kubernetes/kubernetes/pull/58246), [@mikedanese](https://github.com/mikedanese))

*   Kubelet no longer removes unregistered extended resource capacities from node status; cluster admins will have to manually remove extended resources exposed via device plugins when they the remove plugins themselves. ([#53353](https://github.com/kubernetes/kubernetes/pull/53353),[ @jiayingz](https://github.com/jiayingz))

* The --remove-extra-subjects and --remove-extra-permissions flags have been enabled for kubectl auth reconcile ([#64541](https://github.com/kubernetes/kubernetes/pull/64541), [@mrogers950](https://github.com/mrogers950))

- Limit the body length of exec readiness/liveness probes. remote CRIs and Docker shim read a max of 16MB output of which the exec probe itself inspects 10kb. ([#82514](https://github.com/kubernetes/kubernetes/pull/82514), [@dims](https://github.com/dims))

- Remove GAed feature gate DelegateFSGroupToCSIDriver ([#117655](https://github.com/kubernetes/kubernetes/pull/117655), [@carlory](https://github.com/carlory)) [SIG Storage]
- Remove GAed feature gate DevicePlugins ([#117656](https://github.com/kubernetes/kubernetes/pull/117656), [@carlory](https://github.com/carlory)) [SIG Node]

- kube-controller-manager
  - The deprecated `--insecure-experimental-approve-all-kubelet-csrs-for-group` flag has been removed.
- kubelet

* Remove duplicate proto errors in kubelet. ([#52132](https://github.com/kubernetes/kubernetes/pull/52132), [@adityadani](https://github.com/adityadani))