[issue20976] pyflakes: remove unused imports

[R. David Murray]

R. David Murray added the comment:

Well, one reason is I was afraid mailman might be using them.  So if you are cool with it, that removes that objection.

The other reason was that it seemed they were being used "from" utils on purpose, as a design thing.  I did not take the time to do a full analysis, since Victor wanted to get his patch in.

So, if you've taken a look and you think there's no reason to keep them the way they are, then I'm fine with it.

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