chore: T8937: retire Mergify-replaceable GHA caller workflows (rolling)

[andamasov]

LTS-branch sweep for the T8937 GHA retirement (T8937, Phase B prep).

Removes the retired Mergify-replaceable caller workflows from rolling — already removed from rolling in the Phase C sweep; LTS branches are not covered by the mirror pipeline so they need direct PRs. Also removes any workflow still calling the retired central reusables (incl. the typo-named chceck-pr-message.yml where present).

Files deleted: chceck-pr-message.yml

Advances: T8937

🤖 Generated by robots

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository YAML (base), Central YAML (inherited), Organization UI (inherited)

Review profile: CHILL

Plan: Pro

Run ID: e3d457dd-8fe3-4257-a2f5-b34e0c07dee4

📥 Commits

Reviewing files that changed from the base of the PR and between 4fb0250 and 71eb9a1.

📒 Files selected for processing (1)

• .github/workflows/chceck-pr-message.yml

---

📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Removed an internal pull request validation workflow.

Walkthrough

The PR removes the .github/workflows/chceck-pr-message.yml file entirely—a 20-line GitHub Actions workflow that checked PR message format on pull_request_target events. The workflow delegated validation to a reusable workflow (check-pr-message.yml@production) from the shared vyos/.github repository.

Changes

Cohort / File(s)	Summary
Workflow file removal .github/workflows/chceck-pr-message.yml	Deleted GitHub Actions workflow file that performed PR message validation on pull_request_target for rolling, equuleus, sagitta, and circinus branches. The workflow invoked a reusable workflow from vyos/.github with inherited secrets.

Possibly related PRs

• vyos/vyatta-bash#32: Removes other GitHub Actions pull_request_target caller workflows (add-pr-labels.yml, auto-author-assign.yml) as part of the same Mergify migration.
• vyos/vyatta-bash#33: Modifies the same workflow's uses: reference to the shared check-pr-message.yml reusable workflow.
• vyos/vyatta-bash#34: Updates the same workflow's pull_request_target branch filter from current to rolling.

✨ Finishing Touches

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch chore/T8937-retire-mergify-replaceable-ghas-rolling

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[github-actions]

👍
No issues in PR Title / Commit Title