Fix or remove task that fails 95% of the time on 90% of models

[ScuttleBot]

Problem

There's at least one task in PinchBench that has a 95% failure rate across 90% of models. This skews results and wastes compute.

Action Needed

Identify which task this is and either:

• Fix the underlying issue (if it's a test bug)
• Remove it from the benchmark suite (if it's genuinely too hard)

Notes

Look for tasks with consistently low pass rates across diverse model types (not just small/cheap models).