remove package signing

Byron · Byron · commit dc140c0f794e · 2022-10-07T09:55:54.000+08:00
The new key isn't signed with the old key so not accepted downstream,
and that's it as the old key literally broke and there is no backup.
diff --git a/Makefile b/Makefile
@@ -17,4 +17,4 @@ release: clean
 force_release: clean
 	git push --tags origin main
 	python3 setup.py sdist bdist_wheel
-	twine upload 27C50E7F590947D7273A741E85194C08421980C9 dist/*
+	twine upload dist/*
