Remove redhat-8.2.yml var file

This will not work when an operator wants to upgrades from osp-16.1 to
osp-16.2:
16.2 is targeting rhel-8.4 with container-tools:3.0, providing a newer
podman version.

During the upgrade process, we end in a state where we're still running
rhel-8.2, with container-tools:3.0 enabled - leading to an issue when it
comes to the podman version we can get.

Removing this file (and backporting this change down to stable/train)
will allow a swift and smooth fix.

As a last word, this "last security" isn't that useful anymore, since we
have a task that ensures we have the correct module stream[1][2].

[1] https://opendev.org/openstack/tripleo-heat-templates/src/branch/master/deployment/undercloud/undercloud-upgrade.yaml#L67
[2] https://opendev.org/openstack/tripleo-heat-templates/src/branch/master/deployment/tripleo-packages/tripleo-packages-baremetal-puppet.yaml#L261

Closes-Bug: #1927242
Change-Id: Id07aa060dd90fdef9a1cd0a44ddbeaee7d561d18
(cherry picked from commit 3304f4ab35)

tripleo_ansible/roles/tripleo_podman/vars/redhat-8.2.yml

@@ -1,26 +0,0 @@
----
-# Copyright 2019 Red Hat, Inc.
-# All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-
-_tripleo_podman_packages:
-  - podman-1.6.4
-
-_tripleo_buildah_packages:
-  - buildah-1.11.6
-
-_tripleo_podman_purge_packages:
-  - docker
-  - docker-ce