ci: remove renovate-downstream (#25464)

.github/workflows/renovate-downstream.json

@@ -1,18 +0,0 @@
-{
-  "$schema": "http://json.schemastore.org/renovate",
-  "onboarding": false,
-  "requireConfig": true,
-  "gitAuthor": "Renovate Bot <bot@renovateapp.com>",
-  "repositories": [
-    "sourcegraph/deploy-sourcegraph"
-  ],
-  "prBodyNotes": [
-    "{{#if groupName}}Source: {{replace 'Sourcegraph Docker insiders images' 'https://github.com/sourcegraph/sourcegraph/pull/PULL_REQUEST' groupName}}{{/if}}"
-  ],
-  "prFooter": "This PR was generated by the ['Renovate downstream' workflow](https://github.com/sourcegraph/sourcegraph/actions?query=workflow%3A%22Renovate+downstream%22)",
-  "force": {
-    "enabled": true
-  },
-  "logLevel": "debug",
-  "printConfig": true
-}

.github/workflows/renovate-downstream.yml

@@ -1,43 +0,0 @@
-name: Renovate downstream
-on:
-  status:
-  workflow_dispatch:
-
-jobs:
-  # This job should trigger rennovate to run on the repositories defined in renovate-downstream.json
-  renovate:
-    runs-on: ubuntu-latest
-    # Run on commit status success on branch main, ignoring bot events
-    if: ${{ contains(github.event.branches.*.name, 'main') }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-
-      - name: Dump event
-        continue-on-error: true
-        env:
-          EVENT_CONTEXT: ${{ toJson(github) }}
-        run: |
-          echo "$EVENT_CONTEXT"
-
-      # retrieve first pull request attached to this commit
-      - name: Get pull request
-        id: pull_request
-        run: |
-          NUMBER=$(curl \
-            -H "Authorization: token ${{ secrets.BUILDKITE_GITHUBDOTCOM_TOKEN }}" \
-            -H "Accept: application/vnd.github.groot-preview+json" \
-            https://api.github.com/repos/sourcegraph/sourcegraph/commits/${{ github.sha }}/pulls | jq --raw-output '.[0].number' | cat)
-          echo "::set-output name=number::$NUMBER"
-      - name: Update renovate config with PR number
-        run: |
-          sed -i -e 's/PULL_REQUEST/${{ steps.pull_request.outputs.number }}/g' .github/workflows/renovate-downstream.json
-          cat .github/workflows/renovate-downstream.json
-
-      - name: Renovate
-        uses: renovatebot/github-action@v24.16.3
-        with:
-          configurationFile: .github/workflows/renovate-downstream.json
-          # token must be a personal access token for cross-repo access - currently @sourcegraph-bot cross-repo-github-actions in 1password
-          # configure in https://github.com/sourcegraph/sourcegraph/settings/secrets/RENOVATE_TOKEN
-          token: ${{ secrets.RENOVATE_TOKEN }}