remove atomic support because reached end of live (#5783)

roles/kubernetes/preinstall/meta/main.yml

@@ -3,7 +3,6 @@ dependencies:
   - role: adduser
     user: "{{ addusers.kube }}"
     when:
-      - not is_atomic
       - not is_fedora_coreos
     tags:
       - kubelet

roles/kubernetes/preinstall/tasks/0040-set_facts.yml

@@ -22,7 +22,7 @@
   tags:
     - facts
 
-- name: check if atomic host
+- name: check if booted with ostree
   stat:
     path: /run/ostree-booted
   register: ostree
@@ -39,15 +39,6 @@
   set_fact:
     is_fedora_coreos: "{{ ostree.stat.exists and os_variant_coreos is not changed }}"
 
-- name: set is_atomic
-  set_fact:
-    is_atomic: "{{ ostree.stat.exists and not is_fedora_coreos }}"
-
-- name: set kube_cert_group on atomic hosts
-  set_fact:
-    kube_cert_group: "kube"
-  when: is_atomic
-
 - name: check resolvconf
   shell: which resolvconf
   register: resolvconf

roles/kubernetes/preinstall/tasks/0070-system-packages.yml

@@ -23,7 +23,6 @@
     state: absent
   when:
     - ansible_distribution in ["CentOS","RedHat","OracleLinux"]
-    - not is_atomic
     - not is_fedora_coreos
 
 - name: Install python-dnf for latest RedHat versions
@@ -36,7 +35,6 @@
     - ansible_distribution == "Fedora"
     - ansible_distribution_major_version|int > 21
     - ansible_distribution_major_version|int <= 29
-    - not is_atomic
     - not is_fedora_coreos
   changed_when: False
   tags:
@@ -51,7 +49,6 @@
   when:
     - ansible_distribution == "Fedora"
     - ansible_distribution_major_version|int >= 30
-    - not is_atomic
     - not is_fedora_coreos
   changed_when: False
   tags:
@@ -63,7 +60,6 @@
     state: present
   when:
     - ansible_distribution in ["CentOS","RedHat"]
-    - not is_atomic
     - not is_fedora_coreos
     - epel_enabled|bool
   tags:
@@ -83,7 +79,7 @@
   until: pkgs_task_result is succeeded
   retries: 4
   delay: "{{ retry_stagger | random + 3 }}"
-  when: not (ansible_os_family in ["CoreOS", "Coreos", "Container Linux by CoreOS", "Flatcar", "Flatcar Container Linux by Kinvolk", "ClearLinux"] or is_atomic or is_fedora_coreos)
+  when: not (ansible_os_family in ["CoreOS", "Coreos", "Container Linux by CoreOS", "Flatcar", "Flatcar Container Linux by Kinvolk", "ClearLinux"] or is_fedora_coreos)
   tags:
     - bootstrap-os