Removes legacy risk scoring docs (#5497)

(cherry picked from commit bce4151)

docs/advanced-entity-analytics/entity-risk-scoring.asciidoc

@@ -1,6 +1,11 @@
 [[entity-risk-scoring]]
 = Entity risk scoring
 
+[sidebar]
+--
+If you’ve installed the original user and host risk score modules, refer to {security-guide-all}/8.11/host-risk-score.html[Host risk score] and {security-guide-all}/8.11/user-risk-score.html[User risk score].
+--
+
 beta::[]
 
 Entity risk scoring is an advanced {elastic-sec} analytics feature that helps security analysts detect changes in an entity's risk posture, hunt for new threats, and prioritize incident response.

docs/advanced-entity-analytics/turn-on-risk-engine.asciidoc

@@ -23,7 +23,7 @@ image::images/preview-risky-entities.png[Preview of risky entities]
 [NOTE]
 ======
 * To view risk score data, you must have alerts generated in your environment.
-* If you previously installed the original <<user-risk-score, user>> and <<host-risk-score, host risk score>> modules, and you're upgrading to {stack} version 8.11 or newer, refer to <<upgrade-risk-engine, Upgrade to the latest risk engine>>.
+* If you previously installed the original user and host risk score modules, and you're upgrading to {stack} version 8.11 or newer, refer to <<upgrade-risk-engine, Upgrade to the latest risk engine>>.
 ======
 
 If you're installing the risk scoring engine for the first time:

docs/detections/alerts-view-details.asciidoc

@@ -144,8 +144,6 @@ image::images/insights-section-rp.png[Insights section of the Overview tab, 65%]
 
 The Entities overview provides high-level details about the user and host that are related to the alert. Host and user risk classifications are also available with a https://www.elastic.co/pricing[Platinum subscription] or higher. 
 
-NOTE: <<user-risk-score,User>> and <<host-risk-score,host>> risk scores are technical preview features. 
-
 [role="screenshot"]
 image::images/entities-overview.png[Overview of the entity details  section in the right panel, 60%]