chore(just): delete rpm-ostree rechunker (#3021)

Chunkah is overall better and the future of the ecosystem, we will
absolutely not be going back.

Justfile

@@ -345,70 +345,6 @@ rechunk $image=default_image $tag=default_tag $flavor=default_flavor:
     CHUNKED_IMAGE="$(podman pull "oci:${CHUNKAH_OUTPUT_DIR}/chunked")"
     podman tag "${CHUNKED_IMAGE}" "${image_name}:${tag}"
 
-# build-chunked-oci
-[arg("flavor", long="flavor", short="f")]
-[arg("ghcr", long="ghcr", value="true")]
-[arg("image", long="image", short="i")]
-[arg("previous_build", long="previous-build", value="true")]
-[arg("tag", long="tag", short="t")]
-[group('Image')]
-ostree-rechunk $image=default_image $tag=default_tag $flavor=default_flavor $ghcr="false" $previous_build="false":
-    #!/usr/bin/env bash
-    set -eoux pipefail
-
-    {{ just }} validate --image "${image}" --tag "${tag}" --flavor "${flavor}"
-    image_name=$({{ just }} image_name --image "${image}" --tag "${tag}" --flavor "${flavor}")
-    fedora_version=$({{ just }} fedora_version --image "${image}" --tag "${tag}" --flavor "${flavor}")
-
-    if [[ "{{ ghcr }}" == "false" ]]; then
-      {{ just }} load-rootful --image "${image}" --tag "${tag}" --flavor "${flavor}"
-    fi
-
-    # TODO: Redo everything here with --previous-build in rpm-ostree 2026.1+
-    # so we don't have to pull an old image + rename it
-    if [[ "${previous_build}" == "true" ]]; then
-      PREVIOUS_IMAGE=ghcr.io/{{ repo_organization }}/"${image_name}":"${tag}"
-
-      # https://github.com/coreos/rpm-ostree/blob/7e2f2065a4aa4d5965b4537bb7d74e0b2898650e/rust/src/compose.rs#L522-L529
-      if skopeo inspect docker://"${PREVIOUS_IMAGE}" | jq -e '.LayersData[1:] | all(.Annotations?["ostree.components"]?)'; then
-        ${SUDOIF} ${PODMAN} pull ${PREVIOUS_IMAGE}
-      else
-        echo "${PREVIOUS_IMAGE} doesn't exist. Making a fresh layer Plan instead."
-      fi
-    fi
-
-    if [[ "${ghcr}" == "true" ]]; then
-      CHUNKED_IMAGE="${image_name}:${tag}"
-        if [[ "${previous_build}" == "true" ]]; then
-          CHUNKED_IMAGE="${PREVIOUS_IMAGE}"
-        fi
-    else
-      # keep the original unrechunked image for local builds
-      CHUNKED_IMAGE="${image_name}:${tag}-chunked"
-    fi
-
-    # 96 layers, conservative default, same what ci-test is using
-    # one layer is secretly being added for the ostree export
-    # 499 is podman run limit
-    # 128 is docker pull limit
-    ${SUDOIF} ${PODMAN} run --rm \
-        --privileged \
-        -v "/var/lib/containers:/var/lib/containers" \
-        --entrypoint /usr/bin/rpm-ostree \
-        "${base_image_org}/${base_image_name}:${fedora_version}" \
-        compose build-chunked-oci \
-        --max-layers 127 \
-        --format-version=2 \
-        --bootc \
-        --from "localhost/${image_name}:${tag}" \
-        --output containers-storage:${CHUNKED_IMAGE}
-
-        # rename the image to localhost
-        if [[ "${ghcr}" == "true" && "${previous_build}" == "true" ]]; then
-          ${SUDOIF} ${PODMAN} tag ${CHUNKED_IMAGE} "${image_name}:${tag}"
-          ${SUDOIF} ${PODMAN} image rm -f ${CHUNKED_IMAGE}
-        fi
-
 # For Privileged operations
 [arg("flavor", long="flavor", short="f")]
 [arg("image", long="image", short="i")]