testing/py3-django-cors-headers: remove
The package is already provided in community, no need to have it twice.
We are currently working on getting Alpine Linux 3.21 out. This means that merge requests that are not aimed to help with that (only affecting testing, new aports) have a lower priority at the moment. Please be patient, they will be eventually picked up.
The package is already provided in community, no need to have it twice.