Updates docs for ability to unassign asset criticality

docs/advanced-entity-analytics/asset-criticality.asciidoc

@@ -26,7 +26,7 @@ For example, you can assign **Extreme impact** to business-critical entities, or
 [discrete]
 == View and assign asset criticality
 
-Entities do not have a default asset criticality level. You can view, assign, and change asset criticality from the following places in the {elastic-sec} app:
+Entities do not have a default asset criticality level. You can view, assign, change, or unassign asset criticality from the following places in the {elastic-sec} app:
 
 * The <<host-details-page, host details page>> and <<user-details-page, user details page>>:
 +

docs/getting-started/ers-req.asciidoc

@@ -52,11 +52,21 @@ To use the asset criticality feature, turn on the `securitySolution:enableAssetC
 [discrete]
 === Privileges
 
-* To view an entity's asset criticality, you need the `read` privilege for the `.asset-criticality.asset-criticality-<space-id>` index.
-
-* To view, assign, or change an entity's asset criticality, you need the `read` and `write` privileges for the `.asset-criticality.asset-criticality-<space-id>` index.
+To use asset criticality, you need the following privileges for the `.asset-criticality.asset-criticality-<space-id>` index: 
 
 [discrete]
-=== Known limitations
+[width="100%",options="header"]
+|==============================================
+
+| Action | Index privilege
+
+| View asset criticality
+| `read`
+
+| View, assign, or change asset criticality
+| `read` and `write`
+
+| Unassign asset criticality
+| `delete`
 
-* You cannot disable asset criticality as a risk input. Once assigned, an asset criticality level can be changed but not unassigned.
+|==============================================