after a convo with bre & sre, remove long failing workflow. registry cleanup has moved into automated processes in azure (#6804)

.github/workflows/cleanup-after-pr.yml

@@ -1,71 +0,0 @@
-name: Container registry cleanup
-
-on:
-  pull_request:
-    types: [closed]
-
-env:
-  _AZ_REGISTRY: "bitwardenprod.azurecr.io"
-
-jobs:
-  build-docker:
-    name: Remove branch-specific Docker images
-    runs-on: ubuntu-22.04
-    permissions:
-      id-token: write
-    steps:
-      - name: Log in to Azure
-        uses: bitwarden/gh-actions/azure-login@main
-        with:
-          subscription_id: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
-          tenant_id: ${{ secrets.AZURE_TENANT_ID }}
-          client_id: ${{ secrets.AZURE_CLIENT_ID }}
-
-      - name: Log in to Azure ACR
-        run: az acr login -n "$_AZ_REGISTRY" --only-show-errors
-
-      ########## Remove Docker images ##########
-      - name: Remove the Docker image from ACR
-        env:
-          REF: ${{ github.event.pull_request.head.ref }}
-          SERVICES: |
-            services:
-              - Admin
-              - Api
-              - Attachments
-              - Events
-              - EventsProcessor
-              - Icons
-              - Identity
-              - K8S-Proxy
-              - MsSql
-              - Nginx
-              - Notifications
-              - Server
-              - Setup
-              - Sso
-        run: |
-          for SERVICE in $(echo "${SERVICES}" | yq e ".services[]" - )
-          do
-            SERVICE_NAME=$(echo "$SERVICE" | awk '{print tolower($0)}')
-            IMAGE_TAG=$(echo "${REF}" | sed "s#/#-#g")  # slash safe branch name
-
-            echo "[*] Checking if remote exists: $_AZ_REGISTRY/$SERVICE_NAME:$IMAGE_TAG"
-            TAG_EXISTS=$(
-              az acr repository show-tags --name "$_AZ_REGISTRY" --repository "$SERVICE_NAME" \
-              | jq --arg TAG "$IMAGE_TAG" -e '. | any(. == $TAG)'
-            )
-
-            if [[ "$TAG_EXISTS" == "true" ]]; then
-              echo "[*] Tag exists. Removing tag"
-              az acr repository delete --name "$_AZ_REGISTRY" --image "$SERVICE_NAME:$IMAGE_TAG" --yes
-            else
-              echo "[*] Tag does not exist. No action needed"
-            fi
-          done
-
-      - name: Log out of Docker
-        run: docker logout
-
-      - name: Log out from Azure
-        uses: bitwarden/gh-actions/azure-logout@main