Archiving the openedx/django-ratelimit-backend repo

This repo is no longer used in the Nutmeg release.

The tracking ticket is here: [GH Request] Archive the openedx fork of django-ratelimit-backend · Issue #253 · openedx/tcril-engineering · GitHub

Archiving target date: After Nutmeg is released

Please comment here or in the GitHub issue if you have any questions or concerns. Thank you.