added graceful handling of missing optional packages

python_repositories/adapters/redis_adapter.py

@@ -17,9 +17,6 @@ from python_repositories.interfaces import (
 if find_spec("redis") is not None:
     import redis
     from redis.commands.json.path import Path as RedisPath
-else:
-    redis = None  # type: ignore
-    RedisPath = None  # type: ignore
 
 
 class RedisAdapter(