Do not alter etc/hosts (#12382)

This is no longer needed, likely for a long time.

roles/kubernetes/preinstall/defaults/main.yml

@@ -28,28 +28,8 @@ kubelet_flexvolumes_plugins_dir: /usr/libexec/kubernetes/kubelet-plugins/volume/
 # for hostnet pods and infra needs
 resolveconf_cloud_init_conf: /etc/resolveconf_cloud_init.conf
 
-# All inventory hostnames will be written into each /etc/hosts file.
-populate_inventory_to_hosts_file: true
-# K8S Api FQDN will be written into /etc/hosts file.
-populate_loadbalancer_apiserver_to_hosts_file: true
-# etc_hosts_localhost_entries will be written into /etc/hosts file.
-populate_localhost_entries_to_hosts_file: true
-
 sysctl_file_path: "/etc/sysctl.d/99-sysctl.conf"
 
-etc_hosts_localhost_entries:
-  127.0.0.1:
-    expected:
-      - localhost
-      - localhost.localdomain
-  ::1:
-    expected:
-      - localhost6
-      - localhost6.localdomain
-    unexpected:
-      - localhost
-      - localhost.localdomain
-
 # Minimal memory requirement in MB for safety checks
 minimal_node_memory_mb: 1024
 minimal_master_memory_mb: 1500