tests: Remove XSTC Python tests
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while (stack2.length && stack2.at(-1) <= cur) {，详情可参考heLLoword翻译官方下载
Country name & ISO code，这一点在体育直播中也有详细论述
Instead of yielding one chunk per iteration, streams yield Uint8Array[] — arrays of chunks. This amortizes the async overhead across multiple chunks, reducing promise creation and microtask latency in hot paths.