We no longer support python2. Drop PYTHON_PN and use python3 explicitly.
(From OE-Core rev: 877e55cd5d626c2ad06624992ff9e17a2b481acf)
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>