remove non-functional garm image update workflow

.gitea/workflows/garm-image.yml

@@ -1,66 +0,0 @@
-name: Build garm image
-
-on:
-  schedule:
-    - cron: "13 3 * * *"
-  push:
-    branches:
-      - main
-    paths:
-      - .gitea/workflows/garm-image.yml
-      - apps/garm/image-source.env
-      - docker/garm/**
-  workflow_dispatch:
-
-jobs:
-  build-and-push:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Load pin data
-        shell: bash
-        run: |
-          set -euo pipefail
-          source apps/garm/image-source.env
-          echo "GARM_COMMIT=${GARM_COMMIT}" >> "$GITHUB_ENV"
-          echo "GARM_COMMIT_NUMBER=${GARM_COMMIT_NUMBER}" >> "$GITHUB_ENV"
-          echo "GARM_IMAGE=${GARM_IMAGE}" >> "$GITHUB_ENV"
-
-      - name: Verify commit number
-        shell: bash
-        run: |
-          set -euo pipefail
-          tmpdir="$(mktemp -d)"
-          trap 'rm -rf "$tmpdir"' EXIT
-          git clone --filter=blob:none https://github.com/cloudbase/garm.git "$tmpdir"
-          expected="$(git -C "$tmpdir" rev-list --count "$GARM_COMMIT")"
-          if [ "$expected" != "$GARM_COMMIT_NUMBER" ]; then
-            echo "Pin mismatch: expected r${expected}, got r${GARM_COMMIT_NUMBER}" >&2
-            exit 1
-          fi
-
-      - name: Set up Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Login to gitea registry
-        uses: docker/login-action@v3
-        with:
-          registry: gitea.lumpiasty.xyz
-          username: ${{ secrets.REGISTRY_USERNAME }}
-          password: ${{ secrets.REGISTRY_PASSWORD }}
-
-      - name: Build and push
-        uses: docker/build-push-action@v6
-        with:
-          context: .
-          file: docker/garm/Dockerfile
-          push: true
-          build-args: |
-            GARM_COMMIT=${{ env.GARM_COMMIT }}
-          tags: |
-            ${{ env.GARM_IMAGE }}
-          labels: |
-            org.opencontainers.image.source=https://github.com/cloudbase/garm
-            org.opencontainers.image.revision=${{ env.GARM_COMMIT }}