Port benchmark artifact cleanup from superseded PR #3

[bernalde]

Context

PR #3 (pyomo-slim) has been superseded by the seven-PR Pyomo stack, with PR #12 as the stack tip. We should close PR #3 rather than merge it.

Issue

One useful idea from PR #3 remains: its final cleanup removed large generated benchmark artifacts from version control while preserving reproducible benchmark tooling and small summaries.

The current Pyomo stack still appears to track many generated files under benchmarks/results/, including raw JSONL trajectories and generated PNG figures. This conflicts with the intended policy in benchmarks/results/.gitignore and benchmarks/results/README.md.

Suggested action

• Port the benchmark artifact pruning from PR Pyomo: slim PR — remove benchmark artifacts #3 into the benchmark stack, likely PR PR 6/7: Benchmarking infrastructure for scipy vs Pyomo #11 / pr/benchmarks.
• Keep lightweight benchmark summary/reference files only if they are intentional review artifacts.
• Ensure benchmarks/results/.gitignore matches the final policy.
• Leave PR Pyomo: slim PR — remove benchmark artifacts #3 closed as superseded by PRs PR 1/7: CI/CD infrastructure for Pyomo testing #6-PR 7/7: Pyomo documentation, examples, and CHANGELOG #12.

References

• Superseded PR: Pyomo: slim PR — remove benchmark artifacts #3
• Stack tip: PR 7/7: Pyomo documentation, examples, and CHANGELOG #12

[bernalde]

Closed via #21