fix free-disk-space action

[XN137]

the buildpack-deps images have been removed from the runners: actions/runner-images#9093

so we no longer need to clear them up
(the command was failing any workflow that uses the action)

Error response from daemon: No such image: buildpack-deps:buster
Error response from daemon: No such image: buildpack-deps:bullseye

[adutra]

We still should remove all existing docker images. I suggest instead:

    - name: Remove unused Docker images
      shell: bash
      # See https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2204-Readme.md#cached-docker-images
      run: |
        docker image rm node:16 || true
        docker image rm node:16-alpine || true
        docker image rm node:18 || true
        docker image rm node:18-alpine || true
        docker image rm buildpack-deps:buster || true
        docker image rm buildpack-deps:bullseye || true
        docker image rm moby/buildkit:latest || true
        docker image rm alpine:3.16 || true
        docker image rm alpine:3.17 || true
        docker image rm alpine:3.18 || true
        docker image rm debian:10 || true
        docker image rm debian:11 || true
        docker image rm ubuntu:22.04 || true
        docker image rm ubuntu:20.04 || true

wdyt?

[adutra]

In hindsight, we might want instead to detect future changes to the runner images, so maybe your change is better.

[dimas-b]

|| true

I'd prefer to fail on missing (obsolete) images so that we can keep our scripts lean.