- Kubernetes API Go types removed runtime use of the `github.com/gogo/protobuf` library, and are no longer registered into the global gogo type registry. Kubernetes API Go types were not suitable for use with the `google.golang.org/protobuf` library, and no longer implement `ProtoMessage()` by default to avoid accidental incompatible use. If removal of these marker methods impacts your use, it can be re-enabled for one more release with...

	if len(tgtArns) == 0 {
		return dsc
	}
	var sync, replicate bool
	for _, tgtArn := range tgtArns {
		opts.TargetArn = tgtArn
		replicate = rcfg.Replicate(opts)
		// when incoming delete is removal of a delete marker(a.k.a versioned delete),
		// GetObjectInfo returns extra information even though it returns errFileNotFound
		if gerr != nil {
			validReplStatus := false
			switch oi.TargetReplicationStatus(tgtArn) {

### **API Machinery**

### Apps

- The `.spec.rollbackTo` field of the Deployment kind is deprecated in `extensions/v1beta1`.

- The `kubernetes.io/created-by` annotation is deprecated and will be removed in version 1.9.

- The GA TokenRequest and TokenRequestProjection feature gates have been removed and are unconditionally enabled. Remove explicit use of those feature gates in CLI invocations. ([#97148](https://github.com/kubernetes/kubernetes/pull/97148),...

- Removed support for API streaming from the REST client. ([#132285](https://github.com/kubernetes/kubernetes/pull/132285), [@p0lyn0mial](https://github.com/p0lyn0mial))
- Removed support for API streaming from the `List()` method of the typed client. ([#132257](https://github.com/kubernetes/kubernetes/pull/132257), [@p0lyn0mial](https://github.com/p0lyn0mial)) [SIG API Machinery and Testing]

* Removed deprecated --require-kubeconfig flag, removed default --kubeconfig value (([#58367](https://github.com/kubernetes/kubernetes/pull/58367), [@zhangxiaoyu-zidif](https://github.com/zhangxiaoyu-zidif))

### kubeadm
* Quite a few flags been renamed or removed.  Those options that are removed as flags can still be accessed via the config file.  Most notably this includes external etcd settings and the option for setting the cloud provider on the API server.  The [kubeadm reference documentation](https://kubernetes.io/docs/admin/kubeadm/) is up to date with the new flags.

### Other Deprecations

      - [Cluster Lifecycle](#cluster-lifecycle)
      - [Storage](#storage)
    - [Deprecations and Removals](#deprecations-and-removals)
    - [Metrics Changes](#metrics-changes)
      - [Added metrics](#added-metrics)
      - [Removed metrics](#removed-metrics)
      - [Deprecated/changed metrics](#deprecated/changed-metrics)
    - [Notable Features](#notable-features)
      - [Beta](#beta)

- Removed ephemeral container legacy server support for the server versions prior to `1.22`. ([#119537](https://github.com/kubernetes/kubernetes/pull/119537), [@ardaguclu](https://github.com/ardaguclu))
- Removed the `CronJobTimeZone` feature gate (the feature is stable and always enabled)
  - Removed the `JobMutableNodeSchedulingDirectives` feature gate (the feature is stable and always enabled)