chore(ci): remove unused GitHub Actions workflows and orphan files

[yuneng-berri]

Summary

Audit of .github/workflows/ via gh run list --workflow=<file> showed several workflows that have either never run or been dormant for 10+ weeks. This PR removes them along with their orphan helper files. CI coverage that still matters is preserved on CircleCI.

Removed workflows

File	Last run	Why safe to remove
test-litellm.yml	2026-02-12 (cancelled)	workflow_dispatch only; PR trigger commented out; CCI local_testing_part1/2 covers the same tests
llm-translation-testing.yml	2025-07-10	Replaced by CCI llm_translation_testing job. run_llm_translation_tests.py kept because make test-llm-translation still uses it
run_observatory_tests.yml	2026-03-03 (cancelled)	10 weeks dormant, workflow_dispatch only
scan_duplicate_issues.yml	2026-03-02 (failure)	10 weeks dormant; check_duplicate_issues.yml is the actively-firing equivalent
publish_to_pypi.yml	Never run	Never invoked; manual-dispatch only
read_pyproject_version.yml	2026-05-14 (success)	Fires every push to main but only echos the version into nothing — no downstream step consumes it

Removed orphan files

• .github/workflows/README.md — documented only publish_to_pypi.yml
• .github/workflows/update_release.py + results_stats.csv — only referenced each other
• .github/actions/helm-oci-chart-releaser/ — zero references in .github/ or .circleci/

What is NOT removed

• Reusable workflows _test-unit-base.yml (9 callers) and _test-unit-services-base.yml (3 callers) — actively used
• run_llm_translation_tests.py — still invoked by Makefile test-llm-translation target
• auto_update_price_and_context_window_file.py — still used by the (currently-failing) auto-update workflow, which was not in scope for this cleanup

Test plan

• CI passes on this branch — confirms nothing in .github/workflows/ or .circleci/ references the deleted files
• make test-llm-translation still runs locally (script preserved)

---

Note

Low Risk
Low risk because this PR only deletes CI/workflow and helper files; risk is limited to any undiscovered external/manual reliance on the removed workflows or action.

Overview
Cleans up CI configuration by deleting multiple unused/dormant GitHub Actions workflows (PyPI publish, translation testing, observatory tests, duplicate issue scan, deprecated test runner, and a version-read workflow).

Also removes orphaned workflow collateral (a workflow README, update_release.py + results_stats.csv) and an unreferenced composite action (helm-oci-chart-releaser).

^{Reviewed by Cursor Bugbot for commit 3f6c009. Bugbot is set up for automated code reviews on this repo. Configure here.}

[greptile-apps]

Greptile Summary

This PR removes 9 dormant or never-run GitHub Actions workflow files, one orphan composite action, and two helper files (update_release.py, results_stats.csv) from .github/. Cross-checking confirmed no remaining workflow or CircleCI config references any of the deleted paths.

• Six workflows deleted: test-litellm.yml (deprecated, manual-only), llm-translation-testing.yml (replaced by CircleCI, dormant since 2025-07), run_observatory_tests.yml (dormant 10+ weeks), scan_duplicate_issues.yml (superseded by check_duplicate_issues.yml), publish_to_pypi.yml (never run), and read_pyproject_version.yml (no-op echo with no downstream consumer).
• The helm-oci-chart-releaser composite action and its orphan helpers (update_release.py, results_stats.csv, README.md) are removed; grep confirms zero remaining callers.
• Actively-used reusable workflows (_test-unit-base.yml, _test-unit-services-base.yml) and the run_llm_translation_tests.py script (still used by make test-llm-translation) are intentionally preserved.

Confidence Score: 5/5

Pure deletion of dormant CI files with no active callers; safe to merge.

Every deleted file is either self-described as deprecated, has no recorded successful runs in months, or was confirmed to have zero callers remaining in .github/ and .circleci/. The companion script and active reusable workflows are correctly preserved. No production code or test logic is touched.

No files require special attention.

Important Files Changed

Filename	Overview
.github/workflows/run_observatory_tests.yml	Deleted dormant workflow_dispatch/workflow_call workflow; no remaining callers found in .github/workflows/ or .circleci/
.github/workflows/llm-translation-testing.yml	Deleted; also had a push trigger on v*-rc* tags, but replaced by CircleCI and dormant since July 2025; companion script run_llm_translation_tests.py is preserved
.github/workflows/publish_to_pypi.yml	Deleted manual-dispatch-only PyPI publish workflow that was never run
.github/workflows/read_pyproject_version.yml	Deleted no-op workflow that echoed the pyproject.toml version into $GITHUB_ENV with no downstream consumer
.github/actions/helm-oci-chart-releaser/action.yml	Deleted orphan composite action; grep confirmed zero references remain anywhere in .github/
.github/workflows/scan_duplicate_issues.yml	Deleted dormant one-time scan workflow superseded by the active check_duplicate_issues.yml
.github/workflows/test-litellm.yml	Deleted self-described deprecated workflow (workflow_dispatch only); replaced by test-litellm-matrix.yml and CircleCI
.github/workflows/update_release.py	Deleted orphan Python script that uploaded results_stats.csv to GitHub releases; only referenced by the deleted workflow pair
.github/workflows/results_stats.csv	Deleted stub CSV file; only referenced by the deleted update_release.py
.github/workflows/README.md	Deleted documentation file that described only the now-deleted publish_to_pypi.yml workflow

_{Reviews (1): Last reviewed commit: "chore(ci): remove unused GitHub Actions ..." | Re-trigger Greptile}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[mateo-berri]

very nice; lgtm