Merge pull request #9 from spiraldb/mp/pr-template-drop-test-plan

pull_request_template: drop the "Test plan" checklist

Author: mprammer

.github/pull_request_template.md

@@ -1,13 +1,6 @@
 ## Summary
 <!-- What changed and why. 1–3 bullets is plenty. -->
 
-## Test plan
-<!-- See CONTRIBUTING.md for the standard pre-PR gate. -->
-- [ ] `ruff check`
-- [ ] `python -m scripts.pipeline.validate_manifest`
-- [ ] `pytest -q`
-- [ ] (pipeline change only) `python -m scripts.pipeline.build <slug>` end-to-end
-
 ## Type of change
 <!-- Tick one or more. -->
 - [ ] New dataset (manifest entry — see [`SKILLS.md` → Adding a new dataset](../blob/develop/SKILLS.md#adding-a-new-dataset))