control-plane: do not adjust apiserver endpoint (#12870)

This essentially revert the functionnality of 9b0f57a0a (Adjust
endpoints for kube-proxy,controller,scheduler to proper ip (#5150),
2019-09-09).

This is no longer needed since kubeadm now default to use the local
kube-apiserver for control plane components (feature gate
"ControlPlaneKubeletLocalMode")

https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm-init/#feature-gates

roles/kubernetes/control-plane/tasks/kubeadm-fix-apiserver.yml

@@ -1,17 +0,0 @@
----
-
-- name: Update server field in component kubeconfigs
-  lineinfile:
-    dest: "{{ kube_config_dir }}/{{ item }}"
-    regexp: '^    server: https'
-    line: '    server: {{ kube_apiserver_endpoint }}'
-    backup: true
-  with_items:
-    - admin.conf
-    - controller-manager.conf
-    - kubelet.conf
-    - scheduler.conf
-  notify:
-    - "Control plane | Restart kube-controller-manager"
-    - "Control plane | Restart kube-scheduler"
-    - "Control plane | reload kubelet"

roles/kubernetes/control-plane/tasks/main.yml

@@ -99,9 +99,6 @@
   include_tasks: kubeadm-etcd.yml
   when: etcd_deployment_type == "kubeadm"
 
-- name: Include kubeadm secondary server apiserver fixes
-  include_tasks: kubeadm-fix-apiserver.yml
-
 - name: Cleanup unused AuthorizationConfiguration file versions
   file:
     path: "{{ kube_config_dir }}/apiserver-authorization-config-{{ item }}.yaml"