ci: remove unnecessary podman config

Author: feloy

.github/workflows/build-stack.yaml

@@ -46,18 +46,6 @@ jobs:
             sudo apt-get update && \
             sudo apt-get -y install podman; }
           podman version
-      - name: Revert unprivileged user namespace restrictions in Ubuntu 24.04
-        run: |
-          # allow unprivileged user namespace
-          sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0
-      - name: Set cgroup_manager to 'cgroupfs' instead of systemd
-        run: |
-          mkdir -p ~/.config/containers
-          cat <<EOT >> ~/.config/containers/containers.conf
-          [engine]
-          cgroup_manager="cgroupfs"
-          EOT
-          podman info
 
       - name: Install qemu dependency
         run: |