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How do I reduce number of control plane nodes from 3 to 1?

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I have a kubernetes cluster installed with kubeadm. Currently it uses a single control plane node. I'm satisfied with this setup in terms of reliability and don't want to turn it into high-available cluster for now. I want to recreate control plane node, so I want to temporary increase control plane nodes to 3, and then to reduce them back to one. How do I do that? I'm afraid that just by turning off and deleting two control plane nodes I'll end up with non-working cluster.

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cn flag

So apparently it's enough to remove server from etcd member list. I'm using kubeadm and kubeadm can do that. So basically:

kubeadm reset kubectl delete node control-3

repeat for second node, keep one node.

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