[issue22508] Remove __version__ string from email

[Roundup Robot]

Roundup Robot added the comment:

New changeset 67f9e757f21b by R David Murray in branch 'default':
#22508: Drop email __version__ string.  It no longer means anything.
https://hg.python.org/cpython/rev/67f9e757f21b

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nosy: +python-dev

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