[issue24004] avoid explicit generator type check in asyncio

[Roundup Robot]

Roundup Robot added the comment:

New changeset 8296f0119f20 by Yury Selivanov in branch '3.5':
Issue 24004: Fix DeprecationWarning in a unittest
https://hg.python.org/cpython/rev/8296f0119f20

New changeset 60f5091cbfbf by Yury Selivanov in branch 'default':
Issue 24004: Fix DeprecationWarning in a unittest
https://hg.python.org/cpython/rev/60f5091cbfbf

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue24004>
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