Bug#1049950: dh-python: Pybuild runs tests with tox but fails to clean up

[Arto Jantunen]

Package: dh-python
Version: 6.20230813
Severity: normal
Control: block 1045322 by -1

Pybuild uses tox to run the upstream test suite of the package, but
fails to clean up the created .tox directory during debian/rules clean.

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Arto Jantunen