Remove obsolete "Flatcar Container Linux by Kinvolk" fact checks (#13528)

Signed-off-by: Ali Afsharzadeh <afsharzadeh8@gmail.com>

roles/system_packages/tasks/main.yml

@@ -45,7 +45,7 @@
   retries: "{{ pkg_install_retries }}"
   delay: "{{ retry_stagger | random + 3 }}"
   when:
-    - ansible_os_family not in ["Flatcar", "Flatcar Container Linux by Kinvolk"]
+    - ansible_os_family != "Flatcar"
     - not is_fedora_coreos
     - item.packages != []
   loop:

roles/system_packages/vars/main.yml

@@ -55,7 +55,7 @@ pkgs:
   iptables:
     - "{{ ansible_os_family in ['Debian', 'RedHat', 'Suse'] }}"
   iputils:
-    - "{{ not ansible_os_family in ['Flatcar', 'Flatcar Container Linux by Kinvolk', 'Debian'] }}"
+    - "{{ not ansible_os_family in ['Flatcar', 'Debian'] }}"
     - "{{ main_access_ip is defined }}"
     - "{{ ping_access_ip }}"
     - "{{ not is_fedora_coreos }}"