[issue41156] Remove Task.all_tasks and Task.current_task

[Inada Naoki]

Change by Inada Naoki <songofacandy at gmail.com>:


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resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> asyncio.Task.all_tasks() and asyncio.Task.current_task() must be removed in 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41156>
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