Delete committed dataset orphans (Track X)

[mmcky]

Deletes the fifteen committed files no lecture in this edition reads, mirroring the English repo's Track B deletions (QuantEcon/lecture-python.myst#1035, #1037) and its Track X PR of the same title: the ols trio, mle/fp.dta, NEWQDATA.csv, both hansen_singleton data files and their make_data.py builders (the builders now live in data-lectures builders/), the pandas_panel trio, both copies of web_graph_data.txt, and the shadowed graph.txt (separate commit) — plus .gitignore entries for the two %%file-regenerated root files.

Translations sit outside the data-lectures audit's scanned set, so this is the translation half of the orphan sweep: the same files the English repo deletes in its PR of the same title, verified here file by file on 2026-09-01 — every lecture that uses these datasets reads them from QuantEcon/data-lectures, and the rest are written by the lectures themselves with %%file / %%writefile before being read. The translation sync is .md-only, so nothing will re-add them. Every data read in ols.md, mle.md, pandas_panel.md, phillips_drifts_volatilities.md, hansen_singleton_1982.md and hansen_singleton_1983.md points at QuantEcon/data-lectures; finite_markov.md and short_path.md write their files with %%file.

Published surface and settle. Thirteen of the fifteen serve at 200 on quantecon.github.io/lecture-python.zh-cn/ today (the two root files do not). This repo publishes on a publish* tag (last: publish-2026aug24b) with no _build/html prune, so they clear on the settle policy — next Monday clean rebuild, then the next publish.

Rows for QuantEcon/workspace-lectures#40 (published URL, measured today with a 200 page control and a 404 never-existed control on the same host; expect 404 after the settle):

path	today
/_static/lecture_specific/ols/maketable1.dta	200, 14,466 B
/_static/lecture_specific/ols/maketable2.dta	200, 11,210 B
/_static/lecture_specific/ols/maketable4.dta	200, 12,024 B
/_static/lecture_specific/mle/fp.dta	200, 1,024,085 B
/_static/lecture_specific/phillips_drifts_volatilities/NEWQDATA.csv	200, 13,738 B
/_static/lecture_specific/hansen_singleton_1982/hansen_singleton_1982_data.csv	200, 11,662 B
/_static/lecture_specific/hansen_singleton_1982/make_data.py	200, 4,999 B
/_static/lecture_specific/hansen_singleton_1983/hansen_singleton_1983_data.csv	200, 26,084 B
/_static/lecture_specific/hansen_singleton_1983/make_data.py	200, 5,374 B
/_static/lecture_specific/pandas_panel/countries.csv	200, 49,605 B
/_static/lecture_specific/pandas_panel/employ.csv	200, 1,725,234 B
/_static/lecture_specific/pandas_panel/realwage.csv	200, 121,589 B
/_static/lecture_specific/finite_markov/web_graph_data.txt	200, 296 B

Deletion-time reader sweep (2026-09-01). Authenticated tarball-and-grep pass over 407 repositories: all 283 QuantEcon org repos (70 private, 26 archived; numfocus, quantecon-book-dp and test-cli are empty and unfetchable) plus 130 forks of the six holding repos (2 returned 404 and are recorded as not-swept rather than clean). Matched by basename, not URL, with each hit's three preceding lines folded in because URLs get split across source lines. Controls fired in the same pass: a never-existing basename returned 0 hits and 0 copies, and both known readers were found — the English python_advanced_features.md exercise link to test_table.csv, and devopseng99/project.lecture-wasm's runtime fetch of intro's graph.txt. Result: no repository reads any path this PR deletes. Every other co-occurrence of these basenames is a %%file embed, prose, a .gitignore line, or review text; the pre-MyST master/source/… reads in old course repos have been dead since the MyST migration and are unaffected.

Part of the Track X orphan sweep, QuantEcon/workspace-lectures#57 (one PR per holding repo, identical titles). Source list: https://quantecon.github.io/data-lectures/audit.json orphans, 2026-08-31 run.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Removes lecture-specific datasets and helper artifacts that are no longer read from this repository (lectures now fetch them from QuantEcon/data-lectures, or generate them at build time), reducing repository bloat and aligning with the upstream Track X orphan sweep.

Changes:

• Deletes committed orphan datasets and graph data files under lectures/ and lectures/_static/lecture_specific/.
• Removes the committed Hansen–Singleton dataset builder scripts and their frozen CSV snapshots (now sourced externally).
• Adds .gitignore entries to prevent re-committing root-level files regenerated by lecture execution.

Reviewed changes

Copilot reviewed 9 out of 16 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
lectures/web_graph_data.txt	Remove committed graph edge list that is no longer consumed from this repo.
lectures/graph.txt	Remove committed graph data file that is no longer consumed from this repo.
lectures/_static/lecture_specific/phillips_drifts_volatilities/NEWQDATA.csv	Remove vendored dataset snapshot (lecture fetches from data-lectures).
lectures/_static/lecture_specific/pandas_panel/countries.csv	Remove vendored dataset snapshot (lecture fetches from data-lectures).
lectures/_static/lecture_specific/hansen_singleton_1983/make_data.py	Remove local dataset builder script (builder moved upstream).
lectures/_static/lecture_specific/hansen_singleton_1983/hansen_singleton_1983_data.csv	Remove frozen CSV snapshot (lecture fetches from data-lectures).
lectures/_static/lecture_specific/hansen_singleton_1982/make_data.py	Remove local dataset builder script (builder moved upstream).
lectures/_static/lecture_specific/hansen_singleton_1982/hansen_singleton_1982_data.csv	Remove frozen CSV snapshot (lecture fetches from data-lectures).
lectures/_static/lecture_specific/finite_markov/web_graph_data.txt	Remove vendored graph data snapshot (generated during lecture execution).
.gitignore	Add ignore rules for regenerated root-level files.

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[mmcky]

Validation (2026-09-01, preview 6a961919…--astonishing-narwhal): root graph.txt and root web_graph_data.txt → 404; ols.html (131,480 B) and mle.html (164,972 B) → 200. Every consuming page reads data-lectures and none references a local _static copy: ols.html 5 refs, mle.html 1, pandas_panel.html 3, phillips_drifts_volatilities.html 1, hansen_singleton_1982.html 1, hansen_singleton_1983.html 1, finite_markov.html shows the %%file cell. This edition has no short_path lecture, so its graph.txt was a pure stray. Build log: 0 warnings mentioning a deleted basename. Expected exception: the thirteen deleted _static paths still serve at 200 on the preview — it restored the 2026-08-31T05:23Z build-cache, built from main. (This is the stale-_build behaviour from QuantEcon/workspace-lectures#41: the preview restored the build-cache artifact built from main before this branch existed, and this repo has no jb clean . --html prune yet, so the restored copies are re-shipped. It says nothing about the PR; on the live site they clear on the settle policy recorded in the PR body.)