Remove workaround for installing Ussuri and older

This reverts commit cd3fcaf.

Change-Id: I4420680d1e4d962a5a1baa2af1f26df0db37c3bb

Author: priteau

playbooks/roles/bifrost-ironic-install/defaults/main.yml

@@ -323,13 +323,6 @@ ansible_python_interpreter: "{{ bifrost_venv_dir + '/bin/python3' }}"
 # conditional statements in the playbooks.
 noauth_mode: false
 
-# A work around for installing older releases, remove when no longer supporting
-# Ussuri.
-git_branch: master
-supports_http_auth: >-
-  {{ git_branch == "master"
-     or git_branch[7:] not in ["queens", "rocky", "stein", "train", "ussuri"] }}
-
 # Keystone Support
 # Default parameter if keystone is enabled, or disabled.
 enable_keystone: false

playbooks/roles/bifrost-ironic-install/templates/ironic.conf.j2

@@ -236,8 +236,6 @@ username = {{ ironic.service_catalog.username }}
 password = {{ ironic.service_catalog.password }}
 user_domain_id = default
 project_domain_id = default
-{% elif not supports_http_auth | bool %}
-auth_strategy = noauth
 {% else %}
 auth_strategy = http_basic
 auth_type = http_basic