When upgrading from Rocky to Stein we moved also from using the docker
container engine into Podman. To ensure that every single docker container
was removed after the upgrade a post_upgrade task was added which made
use of the tripleo-docker-rm role that removed the container. In this cycle,
from Stein to Train both the Undercloud and Overcloud work with Podman, so
there is no need to remove any docker container anymore.
This patch removes all the tripleo-docker-rm post-upgrade task and in those
services which only included a single task, the post-upgrade-tasks section
is also erased.
Change-Id: I5c9ab55ec6ff332056a426a76e150ea3c9063c6e
4cbae84c75