[issue42392] remove the 'loop' parameter from __init__ in all classes in asyncio.locks

[Yury Selivanov]

Yury Selivanov <yselivanov at gmail.com> added the comment:

> Despite the fact that asyncio.get_running_loop() never returns None but raises RuntimeError (and maybe other tiny cleanups), 

It never raises when called from inside a coroutine. And I propose to do that. So it will never fail.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42392>
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