Remove obsolete Podman installation channels

Since current Debian oldstable we are just using the Debian packages.

roles/float-base-docker/tasks/podman.yml

 ---
 
-# Pick a package source for Podman - defaults to using the stock
-# Debian package since bullseye. Possible choices are 'ai' (a version
-# pinned in our repository, tested working on Debian buster), 'debian'
-# (use standard Debian packages, only available from bullseye) or
-# 'kubic' (use the upstream Kubic repositories, with the latest
-# release).
-- set_fact:
-    podman_default_package_source: "{{ podman_default_package_source_by_distro[float_debian_dist] | default('debian') }}"
-- set_fact:
-    podman_package_source: "{{ podman_default_package_source }}"
-  when: "podman_package_source is not defined"
-
-- include_tasks: "podman_{{ podman_package_source }}.yml"
-
-# Try to detect which podman version we're on based on source and
-# distribution.
+# Install Podman using packages from the Debian distribution
+# (available starting with Bullseye).
+- name: Install Podman packages
+  apt:
+    name: "{{ packages }}"
+    state: present
+  vars:
+    packages:
+      - podman
+      - crun
+
+# Try to detect which podman version we're on based on distribution.
 - set_fact:
     podman_version: "{{ podman_version_by_distro[float_debian_dist] }}"
-  when: "podman_package_source == 'debian'"
-- set_fact:
-    podman_version: 4
-  when: "podman_package_source != 'debian'"
-
-# If we've changed sources.list for podman, it is important
-# that we run apt upgrade now.
-- name: Apt upgrade
-  apt:
-    upgrade: 'yes'
-  when: "podman_sources_list is defined and podman_sources_list.changed"
 
 - name: Symlink podman to docker
   file:

roles/float-base-docker/tasks/podman_ai.yml

----
-
-# Install podman from the A/I package repository. This is a "known
-# good" version that works on Debian Buster.
-#
-# Some dependencies need to be pulled from buster-backports.
-
-- name: Remove podman Kubic repository key
-  file:
-    path: "/etc/apt/trusted.gpg.d/kubic.gpg"
-    state: absent
-
-- name: Remove Kubic podman repository
-  apt_repository:
-    repo: "deb http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/Debian_10/ /"
-    state: absent
-
-- name: Add A/I podman repository
-  apt_repository:
-    repo: "deb [signed-by=/usr/share/keyrings/deb.autistici.org.gpg] http://deb.autistici.org/urepo buster-podman/"
-    state: present
-  register: podman_sources_list
-
-- name: Pin podman packages to our repository
-  copy:
-    dest: "/etc/apt/preferences.d/99podman"
-    content: |
-        Package: podman
-        Pin: origin deb.autistici.org
-        Pin-Priority: 1001
-
-- name: Install podman packages
-  apt:
-    name: podman
-    state: present
-    default_release: "{{ 'buster-backports' if float_debian_dist == 'buster' else '' }}"
-
-# TODO: remove this once the podman packaging issues are fixed.
-- name: Install a working seccomp.json
-  copy:
-    src: "seccomp-0.3.2.json"
-    dest: "/usr/share/containers/seccomp.json"

roles/float-base-docker/tasks/podman_debian.yml

----
-
-# Install Podman using packages from the Debian distribution
-# (available starting with Bullseye).
-
-- name: Remove podman Kubic repository key
-  file:
-    path: "/etc/apt/trusted.gpg.d/kubic.gpg"
-    state: absent
-
-- name: Remove other podman repositories
-  apt_repository:
-    repo: "{{ item }}"
-    state: absent
-  loop:
-    - "deb http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/Debian_10/ /"
-    - "deb [signed-by=/usr/share/keyrings/deb.autistici.org.gpg] http://deb.autistici.org/urepo buster-podman/"
-
-- name: Remove podman package pins
-  file:
-    path: "/etc/apt/preferences.d/99podman"
-    state: absent
-  register: podman_sources_list
-
-- name: Install Podman packages
-  apt:
-    name: "{{ packages }}"
-    state: present
-  vars:
-    packages:
-      - podman
-      - crun

roles/float-base-docker/tasks/podman_kubic.yml

----
-
-# Install Podman from the upstream "kubic" repository. This is usually
-# the latest Podman release.
-
-
-- name: Add podman Kubic repository key
-  copy:
-    src: "kubic.gpg"
-    dest: "/etc/apt/trusted.gpg.d/kubic.gpg"
-
-- name: Remove A/I podman repository
-  apt_repository:
-    repo: "deb [signed-by=/usr/share/keyrings/deb.autistici.org.gpg] http://deb.autistici.org/urepo buster-podman/"
-    state: absent
-
-- name: Add Kubic podman repository
-  apt_repository:
-    repo: "deb http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/Debian_10/ /"
-    state: present
-  register: podman_sources_list
-
-- name: Remove podman package pins
-  file:
-    path: "/etc/apt/preferences.d/99podman"
-    state: absent
-
-# Podman Kubic packages on buster require a version of libseccomp2
-# from the backports.
-- name: Install libseccomp2 from backports
-  apt:
-    name: libseccomp2
-    state: present
-    default_release: buster-backports
-  when: "float_debian_dist == 'buster'"
-
-- name: Install podman packages
-  apt:
-    name: podman
-    state: present

roles/float-base-docker/vars/podman.yml

+---
+
+podman_version_by_distro:
+  buster: 3
+  bullseye: 3
+  bookworm: 4
+  trixie: 5