remove redisco: inactive, discontinued project

No new PyPI releases in 12+ months, no recent activity.
Use Redis OM (redis-om-python) for Redis object mapping.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: vinta

README.md

@@ -801,7 +801,6 @@ Inspired by [awesome-php](https://github.com/ziadoz/awesome-php).
 * NoSQL Databases
     * [mongoengine](https://github.com/MongoEngine/mongoengine) - A Python Object-Document-Mapper for working with MongoDB.
     * [PynamoDB](https://github.com/pynamodb/PynamoDB) - A Pythonic interface for [Amazon DynamoDB](https://aws.amazon.com/dynamodb/).
-    * [redisco](https://github.com/kiddouk/redisco) - A Python Library for Simple Models and Containers Persisted in Redis.
 
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