revisit selector loop policy on windows

[efiop]

ronf/asyncssh#537 (comment)

[SlavaDm]

To fix that problem, I commented a part of the code in file fsspec/asyn.py.

@contextmanager
def _selector_policy():
    original_policy = asyncio.get_event_loop_policy()
    try:
        # if (
        #     sys.version_info >= (3, 8)
        #     and os.name == "nt"
        #     and hasattr(asyncio, "WindowsSelectorEventLoopPolicy")
        # ):
        # asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())
        yield
    finally:
        asyncio.set_event_loop_policy(original_policy)
        

[efiop]

@SlavaDm Thanks for trying it out!

Ok, looks like we need to reconsider fsspec/filesystem_spec#656