[issue40275] test.support has way too many imports

[hai shi]

Change by hai shi <shihai1991 at 126.com>:


----------
pull_requests: +20597
pull_request: https://github.com/python/cpython/pull/21449

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40275>
_______________________________________