Cirrus CI has been removed [ci skip]

.github/workflows/cirrus-notify.yml

@@ -1,52 +0,0 @@
-on:
-  check_suite:
-    types: ['completed']
-name: Cirrus CI failure notification
-
-permissions:
-  contents: read
-
-jobs:
-  cirrus-notify:
-    name: After Cirrus CI Failure
-    if: >-
-      github.event.check_suite.app.name == 'Cirrus CI'
-      && github.event.check_suite.conclusion != 'success'
-      && github.event.check_suite.conclusion != 'cancelled'
-      && github.event.check_suite.conclusion != 'neutral'
-      && github.event.check_suite.conclusion != 'skipped'
-      && github.event.check_suite.head_branch == 'master'
-
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: octokit/request-action@89697eb6635e52c6e1e5559f15b5c91ba5100cb0 # v2.1.9
-        id: get_failed_check_run
-        with:
-          route: GET /repos/${{ github.repository }}/check-suites/${{ github.event.check_suite.id }}/check-runs?status=completed
-          mediaType: '{"previews": ["antiope"]}'
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Dump GitHub context
-        env:
-          GITHUB_CONTEXT: ${{ toJson(github) }}
-        run: echo "$GITHUB_CONTEXT"
-
-      - name: Dump check_runs
-        env:
-          CHECK_RUNS: ${{ steps.get_failed_check_run.outputs.data }}
-        run: echo "$CHECK_RUNS"
-
-      - uses: ruby/action-slack@0bd85c72233cdbb6a0fe01d37aaeff1d21b5fce1 # v3.2.1
-        with:
-          payload: |
-            {
-              "ci": "Cirrus CI",
-              "env": "Cirrus CI",
-              "url": "${{ fromJson(steps.get_failed_check_run.outputs.data).check_runs[0].html_url }}",
-              "commit": "${{ github.event.check_suite.head_commit.id }}",
-              "branch": "${{ github.event.check_suite.head_branch }}"
-            }
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SIMPLER_ALERTS_URL }} # ruby-lang slack: ruby/simpler-alerts-bot