RHIDP-5004 remove useRedisSets (redhat-developer#901)

Author: themr0c

Diff for: modules/dynamic-plugins/proc-installing-and-configuring-redis-cache.adoc

@@ -16,22 +16,4 @@ backend:
   cache:
     store: redis
     connection: redis://user:[email protected]:6379
-    useRedisSets: true
 ----
-
-== Configuring Redis Cache in {product}
-=== useRedisSets
-The `useRedisSets` option lets you decide whether to use Redis sets for key management. By default, this option is set to `true`.
-
-When `useRedisSets` is enabled (`true`):
-
-* A namespace for the Redis sets is created, and all generated keys are added to that namespace, enabling group management of the keys.
-
-* When a key is deleted, it's removed from the main storage and the Redis set.
-
-* When using the clear function to delete all keys, every key in the Redis set is checked for deletion, and the set itself is also removed.
-
-[NOTE]
-In high-performance scenarios, enabling `useRedisSets` can result in memory leaks. If you are running a high-performance application or service, you must set `useRedisSets` to `false`.
-
-When you set `useRedisSets` to `false`, the keys are handled individually and Redis sets are not utilized. This configuration might lead to performance issues in production when using the `clear` function, as it requires iterating over all keys for deletion.