v2: Remove deprecated metrics

[lilic]

For the breaking v2 release we want remove all the metrics that have been marked as DEPRECATED.

Blocked until after release v1.9.0.

[yeya24]

Hello @lilic, can I work on this?

[yeya24]

One question about it.
In https://github.com/kubernetes/kube-state-metrics/blob/master/docs/README.md, there are some metrics marked as deprecated. But in https://github.com/kubernetes/kube-state-metrics/blob/master/docs/node-metrics.md I found there is a metric kube_node_status_phase marked as deprecated, but it is not in the previous doc. So is this metric deprecated? Do we need to remove it as well?

[lilic]

/assign @yeya24

Go ahead, thanks!

Yes lets remove all that are deprecated, maybe the docs are not matched.

[yeya24]

@lilic Thanks.
Another question: Do we still need the two options after removing the deprecated metrics? I guess I need to remove them as well?

	if opts.DisablePodNonGenericResourceMetrics {
		whiteBlackList.Exclude([]string{
			"kube_pod_container_resource_requests_cpu_cores",
			"kube_pod_container_resource_requests_memory_bytes",
			"kube_pod_container_resource_limits_cpu_cores",
			"kube_pod_container_resource_limits_memory_bytes",
		})
	}

	if opts.DisableNodeNonGenericResourceMetrics {
		whiteBlackList.Exclude([]string{
			"kube_node_status_capacity_cpu_cores",
			"kube_node_status_capacity_memory_bytes",
			"kube_node_status_capacity_pods",
			"kube_node_status_allocatable_cpu_cores",
			"kube_node_status_allocatable_memory_bytes",
			"kube_node_status_allocatable_pods",
		})
	}