Bug#1010279: python-iso8601: please make the build reproducible

[James Addison]

Followup-For: Bug #1010279
X-Debbugs-Cc: lamby at debian.org, reproducible-bugs at lists.alioth.debian.org
Control: block -1 1056291
Control: close -1

Based on recent reproducible build testing history[1] of this package, and for
Debian versions after the fix for #1056291 became available (excludes both
bookworm, and builds prior to 2023-12-04 or so), I'm confident that the package
is building reproducibly, so I think we can close this.

(note: the failures that _have_ occurred recently when build-testing on
bookworm illustrate the same dot-dir pollution that we saw previously:
unexpected packaging of .hypothesis and .pytest_cache directories)

Adding a bug-blocker relationship for historical tracking purposes and closing
this bug.

[1] - https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/python-iso8601.html