Drop ansible-playbook-3 workarounds

This code was necessary when doing the python2/python3 transition but is
no longer required.

Depends-On: https://review.opendev.org/c/openstack/tripleo-common/+/811481
Change-Id: Ib6cf8763db1b4b1dabee99ae96e24e688c675651

tripleo_ansible/roles/tripleo_bootstrap/tasks/main.yml

@@ -117,23 +117,3 @@
   loop:
     - /etc/sysconfig/iptables
     - /etc/sysconfig/ip6tables
-
-- name: Check if /usr/bin/ansible-playbook exists
-  stat:
-    path: /usr/bin/ansible-playbook
-  register: stat_ansible_playbook
-
-- name: Check if /usr/bin/ansible-playbook-3 exists
-  stat:
-    path: /usr/bin/ansible-playbook-3
-  register: stat_ansible_playbook_3
-
-- name: Symlink /usr/bin/ansible-playbook-3 to /usr/bin/ansible-playbook
-  become: true
-  file:
-    state: link
-    src: /usr/bin/ansible-playbook
-    path: /usr/bin/ansible-playbook-3
-  when:
-    - stat_ansible_playbook.stat.exists
-    - not stat_ansible_playbook_3.stat.exists