remove release protector (#60755)

.github/workflows/release-protector.yml

@@ -1,53 +0,0 @@
-name: Release protector
-on:
-  pull_request:
-    types: [edited, opened, synchronize, ready_for_review, labeled, unlabeled]
-    branches:
-      # only run on branches targeting the `main` branch.
-      - main
-
-jobs:
-  validate_release_branch:
-    runs-on: ubuntu-latest
-    if: ${{ github.repository == 'sourcegraph/sourcegraph' && !github.event.pull_request.draft }}
-    outputs:
-      releaseBranchExists: ${{ steps.checkout.outputs.exists }}
-    steps:
-      - name: Check if latest release branch exists
-        id: checkout
-        run: |
-          branch="5.1"
-          if curl --silent -I "https://api.github.com/repos/sourcegraph/sourcegraph/git/refs/heads/${branch}" | grep "HTTP/2 200"; then
-            echo "::set-output name=exists::true"
-          else
-            echo "::set-output name=exists::false"
-          fi
-
-  protect-pr:
-    runs-on: ubuntu-latest
-    needs: validate_release_branch
-    # We're manually updating the release protector for now, so we only want to run it when the branch exists. If the branch doesn't exist,
-    # we do not need to run it.
-    if: ${{ needs.validate_release_branch.outputs.releaseBranchExists == 'true' }}
-    steps:
-      - name: Check backport labels during code freeze
-        id: check-backport-labels-during-code-freeze
-        run: |
-          # Does this PR have the acknowledgement label?
-          has_label="${{contains(github.event.pull_request.labels.*.name, 'confirm-no-backport') || contains(github.event.pull_request.labels.*.name, 'backport 5.0')}}"
-
-          enabled="true"
-          if [ ${enabled} = "true" ]; then
-            if [ "${has_label}" = "true" ]; then
-              echo "✅ Label 'confirm-no-backport or backport 5.0' is present"
-              exit 0
-            else
-              echo "❌ Label 'confirm-no-backport' or 'backport 5.0' is absent"
-              echo "👉 We're in the next Sourcegraph release code freeze period. If you are 100% sure your changes should get released or provide no risk to the release, add the 'backport 5.0' label your PR. If you don't want to include this change, add 'confirm-no-backport' to merge into main without backport."
-              echo "To learn more about backporting, see the handbook https://handbook.sourcegraph.com/departments/engineering/dev/tools/backport/#how-should-i-use-the-backporting-tool"
-              exit 1
-            fi
-          else
-            echo "📅 Not enabled"
-            exit 0
-          fi