www/py-dj42-django-timezone-field: Update to 6.1.0

www/py-dj42-django-timezone-field: Update to 6.1.0

• Remove no longer required patch that has been merged by upstream.

Changelog:

https://github.com/mfogel/django-timezone-field/compare/6.0.1...6.1.0

MFH: 2023Q4