[ChrisRackauckas-Claude]

Please ignore until reviewed by @ChrisRackauckas.

What changed and why

This reverts the workflow change from #177. That PR added .github/workflows/Documentation.yml (the reusable CPU workflow), but HighDimPDE already builds its documentation on a self-hosted GPU runner:

• .github/workflows/GPU.yml → gpu-docs job, job name "Documentation", runs-on: [self-hosted, gpu-v100], which activates docs/ and runs docs/make.jl with the deploy key. It is green on main (e.g. run https://github.com/SciML/HighDimPDE.jl/actions/runs/35259116305 → Documentation=success).

So main currently runs two identically named "Documentation" checks that both build and deploy the same site from different runners, and the CPU one cannot execute the package's GPU examples. #177 changed nothing else — its diff was .github/workflows/Documentation.yml only — so removing that file is a complete revert.

I checked every other docs workflow PR merged in the same sweep by scanning each repo's workflows at the PR's base commit for a docs build (docs/make.jl, Pkg.activate("docs"), a documentation.yml@ reusable call, or julia-docdeploy). HighDimPDE is the only one where the base already had a docs build; the other 16 added a first docs build and are not duplicates. A repo-wide scan of all 139 in-scope repos likewise finds no other repo with two docs-building workflows.

Verification

• main's GPU docs job is green: run https://github.com/SciML/HighDimPDE.jl/actions/runs/35259116305 → Documentation=success.
• grep -rl 'docs/make.jl' .github/workflows after this change matches only GPU.yml.
• Removal cannot affect the published site, since the surviving job is the one that was already building and deploying it.

Not verified

• I did not run the GPU docs job locally (no GPU here); the claim rests on the existing green run plus the fact that the removed workflow was added after it.

🤖 Generated with OpenCode (model: muse-spark-1.3-contributor-free); no public session URL (local session at /home/crackauc/sandbox/tmp_20260917_040834_91074).