Revert "ci: Build & Publish Fedora Toolbx images with GitHub Packages"

This revert is done based on discussion happening around the PR that
originally added the change[0].

This reverts commit 818748001c.

[0] https://github.com/containers/toolbox/pull/973

https://github.com/containers/toolbox/pull/1028

.github/workflows/image-factory.yaml

@@ -1,59 +0,0 @@
-name: Image Factory
-on:
-  workflow_dispatch:
-  schedule:
-    - cron: "0 0 * * *"
-
-env:
-  IMAGE_REGISTRY: ghcr.io/${{ github.repository_owner }}
-  REGISTRY_USER: ${{ github.actor }}
-  REGISTRY_PASSWORD: ${{ secrets.GITHUB_TOKEN }}
-
-jobs:
-  build-push-images:
-    name: Build & Push Toolbx images
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        pool:
-          - image: fedora-toolbox-36
-            version: 36
-            dir: fedora/f36
-
-          - image: fedora-toolbox-35
-            version: 35
-            dir: fedora/f35
-
-          - image: fedora-toolbox-34
-            version: 34
-            dir: fedora/f34
-
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: Login to Registry
-        uses: redhat-actions/podman-login@v1
-        with:
-          username: ${{ env.REGISTRY_USER }}
-          password: ${{ env.REGISTRY_PASSWORD }}
-          registry: ${{ env.IMAGE_REGISTRY }}
-
-      - name: Build Image
-        id: build-image
-        uses: redhat-actions/buildah-build@v2
-        with:
-          containerfiles: ./images/${{ matrix.pool.dir }}/Containerfile
-          context: ./images/${{ matrix.pool.dir }}
-          image: ${{ matrix.pool.image }}
-          oci: true
-          tags: ${{ matrix.pool.version }}
-
-      # TODO: Testing of newly-created images
-
-      - name: Push Image
-        uses: redhat-actions/push-to-registry@v2
-        with:
-          image: ${{ steps.build-image.outputs.image }}
-          tags: ${{ steps.build-image.outputs.tags }}
-          registry: ${{ env.IMAGE_REGISTRY }}
-