fix travis error

Author: mburke5678

modules/efk-logging-deploy-variables.adoc

@@ -380,7 +380,7 @@ create per Elasticsearch instance. For example, 100G. If omitted, no PVCs are
 created and ephemeral volumes are used instead. If you set this parameter, the logging installer sets `openshift_logging_elasticsearch_storage_type` to `pvc`.
 
 |`openshift_logging_elasticsearch_storage_type`
-|Sets the Elasticsearch storage type. If you are using xref:aggregated-logging-persistent-storage[Persistent Elasticsearch Storage], the logging installer sets this to `pvc`.
+|Sets the Elasticsearch storage type. If you are using Persistent Elasticsearch Storage, the logging installer sets this to `pvc`.
 
 |`openshift_logging_elasticsearch_storage_type`
 |Sets the Elasticsearch storage type. If you are using Persistent Elasticsearch Storage, set to `pvc`.