unpack_sequence benchmark too fast on modern computers

On modern computers, unpack_sequence completes in nanoseconds (!!!).

This is basically within the range of noise for modern computers. The cause is that for some reason, the inner loops are hardcoded instead of letting pyperf decide

https://github.com/python/pyperformance/blob/main/pyperformance/data-files/benchmarks/bm_unpack_sequence/run_benchmark.py#L457

The fix is simple: just remove the inner_loops argument. However, fixing this would need a major version bump, as all past unpack sequence results would be invalidated.

打开 pyperformance/data-files/benchmarks/bm_unpack_sequence/run_benchmark.py 的第 457 行附近，并检查硬编码的 inner_loops 参数。移除该参数，使 pyperf 可以选择循环次数，然后验证 unpack_sequence 基准测试的计时，并考虑所需的 major 版本升级，因为之前的结果将变得无效。