Revert "Disk image: update from the forge, not localhost/"

This reverts commit d8146748c9.

Taskfile.yml

@@ -8,10 +8,6 @@ vars:
   # Override with a local build of the fork (BASE_IMAGE=localhost/aurora:stable,
   # see README) or stock upstream (BASE_IMAGE=ghcr.io/ublue-os/aurora:stable).
   BASE_IMAGE: forge.quinefoundation.com/quine-global-labs/aurora:stable
-  # Where installed systems get their updates: the disk image and the live
-  # ISO's installs point bootc here, and Aurora's uupd.timer stages whatever
-  # is newest there daily, for the next boot. iso.yml pushes it.
-  UPDATE_IMAGE: forge.quinefoundation.com/quine-global-labs/quine-linux:latest
   OUTPUT_DIR: '{{.ROOT_DIR}}/output'
   # Root is needed for the container builds and bootc; skip {{.SUDO}} when already
   # root (e.g. on a CI runner, which may not have {{.SUDO}} at all).
@@ -80,14 +76,6 @@ tasks:
       - task: build-image
       - task: export-to-storage
         vars: { IMAGES: "{{.IMAGE}}" }
-      # bootc follows the name the disk is built from, so build it from
-      # UPDATE_IMAGE's, not localhost/: installs then update from the forge.
-      # (bootc-image-builder's --target-imgref did this; image-builder
-      # dropped it.)
-      - >-
-        {{if eq .CONTAINER_RUNTIME "podman"}}{{.SUDO}} podman tag localhost/{{.IMAGE}} {{.UPDATE_IMAGE}}{{else}}{{.SUDO}} {{.CONTAINER_RUNTIME}} run --rm --privileged
-        -v {{.STORAGE}}:/var/lib/containers/storage {{.SKOPEO_IMAGE}}
-        copy containers-storage:localhost/{{.IMAGE}}:latest containers-storage:{{.UPDATE_IMAGE}}{{end}}
       - mkdir -p {{.OUTPUT_DIR}}
       # Root on btrfs, as Aurora installs it: disk/config.toml.
       - >-
@@ -98,7 +86,7 @@ tasks:
         -v {{.STORAGE}}:/var/lib/containers/storage
         {{.BIB_IMAGE}}
         --type qcow2
-        {{.UPDATE_IMAGE}}
+        localhost/{{.IMAGE}}
     generates:
       - "{{.OUTPUT_DIR}}/qcow2/disk.qcow2"
 
@@ -108,7 +96,7 @@ tasks:
       plus the live session and Anaconda WebUI, with PAYLOAD_IMAGE (what the
       installer installs) pulled into it. Podman only.
     vars:
-      PAYLOAD_IMAGE: '{{.PAYLOAD_IMAGE | default .UPDATE_IMAGE}}'
+      PAYLOAD_IMAGE: '{{.PAYLOAD_IMAGE | default "forge.quinefoundation.com/quine-global-labs/quine-linux:latest"}}'
     preconditions:
       - sh: '[ "{{.CONTAINER_RUNTIME}}" = podman ]'
         msg: The live ISO tasks need podman (they mount the image into Titanoboa's container).