Deprecation/Removal: ChordableDjangoBackend in celery-utils (DEPR-89)

Hi there,

We plan to deprecate and remove ChordableDjangoBackend from edx-celeryutils, which is used in edx-platform. We are targeting removal after April 20, 2020.

Please read https://openedx.atlassian.net/browse/DEPR-89 for more information and to post any questions/comments. The proposed deadline for comments before acceptance is April 11, 2020.

Thanks,
Tim McCormack