Polishing.

Original Pull Request: #4949

src/main/antora/modules/ROOT/pages/repositories/core-concepts.adoc

@@ -2,11 +2,3 @@ include::{commons}@data-commons::page$repositories/core-concepts.adoc[]
 
 [[mongodb.entity-persistence.state-detection-strategies]]
 include::{commons}@data-commons::page$is-new-state-detection.adoc[leveloffset=+1]
-
-[NOTE]
-====
-Cassandra provides no means to generate identifiers upon inserting data.
-As consequence, entities must be associated with identifier values.
-Spring Data defaults to identifier inspection to determine whether an entity is new.
-If you want to use xref:mongodb/auditing.adoc[auditing] make sure to either use xref:mongodb/template-crud-operations.adoc#mongo-template.optimistic-locking[Optimistic Locking] or implement `Persistable` for proper entity state detection.
-====