Drop reference to ephemeral storage

doc-Service-Telemetry-Framework/assemblies/assembly_advanced-features.adoc

@@ -11,7 +11,6 @@ You can use the following operational features to provide additional functionali
 * xref:alerts_assembly-advanced-features[Configuring alerts]
 * xref:configuring-snmp-traps_assembly-advanced-features[Configuring SNMP traps]
 * xref:high-availability_assembly-advanced-features[Configuring high availability]
-* xref:ephemeral-storage_assembly-advanced-features[Configuring ephemeral storage]
 * xref:observability-strategy-in-service-telemetry-framework_assembly-advanced-features[Configuring an alternate observability strategy]
 
 ifdef::include_when_16[]
@@ -56,12 +55,6 @@ endif::include_when_13,include_when_17[]
 include::../modules/con_high-availability.adoc[leveloffset=+1]
 include::../modules/proc_configuring-high-availability.adoc[leveloffset=+2]
 
-//Configuring ephemeral storage
-include::../modules/con_ephemeral-storage.adoc[leveloffset=+1]
-ifeval::["{build}" == "upstream"]
-include::../modules/proc_configuring-ephemeral-storage.adoc[leveloffset=+2]
-endif::[]
-
 //Observability strategy
 include::../modules/con_observability-strategy.adoc[leveloffset=+1]
 include::../modules/proc_configuring-observability-strategy.adoc[leveloffset=+2]

doc-Service-Telemetry-Framework/assemblies/assembly_preparing-your-ocp-environment-for-stf.adoc

@@ -17,7 +17,6 @@ endif::[]
 
 include::../modules/con_observability-strategy.adoc[leveloffset=+1]
 include::../modules/con_persistent-volumes.adoc[leveloffset=+1]
-include::../modules/con_ephemeral-storage.adoc[leveloffset=+2]
 include::../modules/con_resource-allocation.adoc[leveloffset=+1]
 include::../modules/con_network-considerations-for-service-telemetry-framework.adoc[leveloffset=+1]
 

doc-Service-Telemetry-Framework/modules/con_observability-strategy.adoc

@@ -4,4 +4,4 @@
 [role="_abstract"]
 {Project} ({ProjectShort}) does not include storage backends and alerting tools. {ProjectShort} uses community operators to deploy Prometheus, Alertmanager, Grafana, and Elasticsearch. {ProjectShort} makes requests to these community operators to create instances of each application configured to work with {ProjectShort}.
 
-Instead of having Service Telemetry Operator create custom resource requests, you can use your own deployments of these applications or other compatible applications, and scrape the metrics Smart Gateways for delivery to your own Prometheus-compatible system for telemetry storage. If you set the observability strategy to use alternative backends instead, persistent or ephemeral storage is not required for {ProjectShort}.
+Instead of having Service Telemetry Operator create custom resource requests, you can use your own deployments of these applications or other compatible applications, and scrape the metrics Smart Gateways for delivery to your own Prometheus-compatible system for telemetry storage. If you set the `observabilityStrategy` to `none`, then storage backends will not be deployed so persistent storage will not be required by {ProjectShort}.