Stop installing Python and pip in the Molecule prepare.yml playbook

Python and pip should instead be listed as dependencies in roles that
require them.

Author: jsf9k

molecule/default/prepare.yml

@@ -1,6 +1,3 @@
 ---
 - name: Import upgrade playbook
   ansible.builtin.import_playbook: upgrade.yml
-
-- name: Import python playbook
-  ansible.builtin.import_playbook: python.yml

molecule/default/python.yml

@@ -1,9 +1,3 @@
 ---
-- src: https://github.com/cisagov/ansible-role-pip
-  name: pip
-- src: https://github.com/cisagov/ansible-role-python
-  name: python
-- src: https://github.com/cisagov/ansible-role-remove-python2
-  name: remove_python2
 - src: https://github.com/cisagov/ansible-role-upgrade
   name: upgrade