Remove dual-hosted info about kops and kubespray

Both tools have there own site and documentation. We can remove the
details from the website, leaving only some pointers for users who
really need to find out more.

Author: tengqm

content/en/docs/setup/production-environment/_index.md

@@ -296,9 +296,8 @@ needs of your cluster's workloads:
   and the
   [API server](/docs/setup/production-environment/tools/kubeadm/ha-topology/).
 - Choose from [kubeadm](/docs/setup/production-environment/tools/kubeadm/),
-  [kops](/docs/setup/production-environment/tools/kops/) or
-  [Kubespray](/docs/setup/production-environment/tools/kubespray/)
-  deployment methods.
+  [kops](https://kops.sigs.k8s.io/) or
+  [Kubespray](https://kubespray.io/) deployment methods.
 - Configure user management by determining your
   [Authentication](/docs/reference/access-authn-authz/authentication/) and
   [Authorization](/docs/reference/access-authn-authz/authorization/) methods.

content/en/docs/setup/production-environment/tools/_index.md

@@ -1,4 +1,23 @@
 ---
 title: Installing Kubernetes with deployment tools
 weight: 30
+no_list: true
 ---
+
+There are many methods and tools for setting up your own production Kubernetes cluster.
+For example:
+
+- [kubeadm](/docs/setup/production-environment/tools/kubeadm/)
+
+- [kops](https://kops.sigs.k8s.io/): An automated cluster provisioning tool.
+  For tutorials, best practices, configuration options  and information on
+  reaching out to the community, please check the
+  [`kOps` website](https://kops.sigs.k8s.io/) for details.
+
+- [kubespray](https://kubespray.io/):
+  A composition of [Ansible](https://docs.ansible.com/) playbooks,
+  [inventory](https://github.com/kubernetes-sigs/kubespray/blob/master/docs/ansible.md#inventory),
+  provisioning tools, and domain knowledge for generic OS/Kubernetes clusters configuration
+  management tasks. You can reach out to the community on Slack channel
+  [#kubespray](https://kubernetes.slack.com/messages/kubespray/).
+