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bpo-40443: Remove unused imports (GH-25429)

* pyclbr no longer uses copy
* typing no longer uses ast

Issue discovered by pyflakes.
V
Victor Stinner committed
a6a5c91b1ee56fa5ba7ab8c5aeca70c31cc85fd3
Parent: 8a232c7
Committed by GitHub <noreply@github.com> on 4/16/2021, 9:26:06 AM