This partially reverts commit 18b4251bf4.
Support for loading distutils from the standard library is now deprecated
since v70.3.0 [1]. It was needed initially to ease the transition and
can be removed now.
[1] https://setuptools.pypa.io/en/latest/history.html#v70-3-0
Change-Id: Ib929219ae81b802a4632963ef71a258edf4deee5