www/py-dj42-django-guardian: Remove expired port

2024-06-15 www/py-dj42-django-guardian: Obsolete, please use
www/py-django-guardian instead

*/py-dj42*: Deprecate/Set to expire

* The */py-dj42* ports have no more consumers and are redundant now
  as all the other Django ports have been switched from Django 3.2
  to Django 4.2 in the last few weeks. [1]

PR:		276319 [1]
With hat:	python

www/py-dj42-django-guardian: New port

Django 4.2 version of www/py-django-guardian, happy to pass it to its
maintainer or make it disappear, once 4.2 is the default django version.