main/py3-packaging: drop dependency on py3-six

not needed since 20.5 / 2020:
https://github.com/pypa/packaging/commit/39a70cce

main/py3-packaging/APKBUILD

@@ -3,13 +3,13 @@
 pkgname=py3-packaging
 _pkgname=packaging
 pkgver=21.3
-pkgrel=1
+pkgrel=2
 pkgdesc="Core utilities for Python3 packages"
 options="!check" # Requires py3-pytest which requires py3-setuptools
 url="https://pypi.python.org/pypi/packaging"
 arch="noarch"
 license="Apache-2.0 AND BSD-2-Clause"
-depends="python3 py3-parsing py3-six"
+depends="python3 py3-parsing"
 # disable check to break circular dep with py3-setuptools
 checkdepends="py3-pytest py3-pretend"
 source="https://files.pythonhosted.org/packages/source/p/packaging/packaging-$pkgver.tar.gz"