devel/py-urwid: Update to 3.0.3
- Remove useless post-install
Release notes: https://github.com/urwid/urwid/releases/tag/3.0.0
https://github.com/urwid/urwid/releases/tag/3.0.1 https://github.com/urwid/urwid/releases/tag/3.0.2 https://github.com/urwid/urwid/releases/tag/3.0.3
PR: 293174