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

roles/bootstrap-os/tasks/bootstrap-centos.yml

@@ -24,15 +24,6 @@
 
 # CentOS ships with python installed
 
-- name: Check if this is an atomic host
-  stat:
-    path: /run/ostree-booted
-  register: ostree
-
-- name: Store the fact if this is an atomic host
-  set_fact:
-    is_atomic: "{{ ostree.stat.exists }}"
-
 - name: Check presence of fastestmirror.conf
   stat:
     path: /etc/yum/pluginconf.d/fastestmirror.conf
@@ -73,5 +64,3 @@
     name: "{{ ( (ansible_distribution_major_version | int) < 8) | ternary('libselinux-python','python3-libselinux') }}"
     state: present
   become: true
-  when:
-    - not is_atomic

roles/bootstrap-os/tasks/bootstrap-fedora.yml

@@ -1,21 +1,6 @@
 ---
 # Some Fedora based distros ship without Python installed
 
-- name: Check if this is an atomic host
-  raw: stat /run/ostree-booted
-  register: ostree
-  environment: {}
-  failed_when: false
-  changed_when: false
-  tags:
-    - facts
-
-- name: Store the fact if this is an atomic host
-  set_fact:
-    is_atomic: "{{ ostree.rc == 0 }}"
-  tags:
-    - facts
-
 - name: Check if bootstrap is needed
   raw: which python
   register: need_bootstrap
@@ -43,7 +28,6 @@
   when:
     - http_proxy is defined
     - need_http_proxy.rc != 0
-    - not is_atomic
 
 # Fedora's policy as of Fedora 30 is to still install python2 as /usr/bin/python
 # See https://fedoraproject.org/wiki/FinalizingFedoraSwitchtoPython3 for the current status
@@ -53,7 +37,6 @@
   environment: {}
   when:
     - need_bootstrap.rc != 0
-    - not is_atomic
 
 # libselinux-python is required on SELinux enabled hosts
 # See https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html#managed-node-requirements
@@ -62,5 +45,3 @@
     name: libselinux-python
     state: present
   become: true
-  when:
-    - not is_atomic