Remove detail.md from per-benchmark output (user preference: report.jsonl + summary.xlsx only)

Co-Authored-By: Claude <noreply@anthropic.com>

evalharness/cli.py

@@ -690,8 +690,6 @@ def _cmd_eval_run(args) -> int:
                 bench_dir = _P(out_dir) / name
                 bench_dir.mkdir(parents=True, exist_ok=True)
                 report.save(str(bench_dir / 'report.jsonl'))
-                with open(bench_dir / 'detail.md', 'w', encoding='utf-8') as f:
-                    f.write(render(report, style='md'))
             if args.verbose:
                 if not _print_result_panel(console, report, _time.time() - t0):
                     print(render(report, style=args.style))