chore: drop mirror caller workflow (Rollout 2 Task 7)

[andamasov]

Removes the per-repo mirror caller workflow .github/workflows/pr-mirror-repo-sync.yml.

This repo was excluded from the mirror consumers.yaml set during the Rollout 2 review (VD-4257). Dropping the caller stops it from participating in the vyos → VyOS-Networks PR-mirror pipeline.

Part of Mirror Pipeline Rollout 2, Task 7 (dead-wrapper sweep).

Related: VD-4257

🤖 Generated by robots

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

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

Review profile: CHILL

Plan: Pro Plus

Run ID: e9bd8de4-dc80-452b-8e6b-3843c627d9e4

📥 Commits

Reviewing files that changed from the base of the PR and between 4f6a4c1 and 31ac54d.

📒 Files selected for processing (1)

• .github/workflows/pr-mirror-repo-sync.yml

💤 Files with no reviewable changes (1)

• .github/workflows/pr-mirror-repo-sync.yml

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📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Removed automated pull request mirroring and repository synchronization workflow configuration.

Walkthrough

This PR removes the .github/workflows/pr-mirror-repo-sync.yml GitHub Actions workflow. The workflow previously handled pull_request_target events on the production branch and closed PRs via workflow_dispatch, invoking a reusable workflow with inherited secrets for repository synchronization and PR mirroring.

Changes

Cohort / File(s)	Summary
Workflow Deletion .github/workflows/pr-mirror-repo-sync.yml	Complete removal of 30-line GitHub Actions workflow for PR mirroring and repository synchronization tied to pull_request_target and workflow_dispatch events.

Possibly related PRs

• vyos/vyos-infrastructure#9: Initially added the pr-mirror-repo-sync.yml workflow that this PR removes.
• vyos/vyos-infrastructure#12: Previously modified the dispatch inputs, job conditions, and secrets handling of the same workflow being deleted here.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	Title accurately describes the main change: removing the PR mirror caller workflow as part of Rollout 2 Task 7.
Description check	✅ Passed	Description clearly relates to the changeset, explaining why the workflow is removed and referencing relevant Jira ticket VD-4257.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch chore/rollout2-task7-drop-mirror-wrapper

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