Remove ominous sentence refering to exception, as there is a fix in place in master

Author: marregui

docs/clustering/downscaling.rst

@@ -218,19 +218,6 @@ In the `Admin UI`_, we can follow the progress of replication.
 
 3. Run *./detach-node ni*, where i in [2,3], to detach **n2** and **n3** from the cluster.
    We will let **n1** form a new cluster all by itself, with access to the original data.
-   The command succeeds but delivers an exception that you can ignore safely:
-
-   ::
-
-       Node was successfully detached from the cluster
-       Exception in thread "Thread-0" java.lang.NoClassDefFoundError: org/elasticsearch/core/internal/io/IOUtils
-	           at org.elasticsearch.cli.MultiCommand.close(MultiCommand.java:82)
-	           at org.elasticsearch.cli.Command.lambda$main$0(Command.java:70)
-	           at java.base/java.lang.Thread.run(Thread.java:832)
-       Caused by: java.lang.ClassNotFoundException: org.elasticsearch.core.internal.io.IOUtils
-	           at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
-	           at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
-	           at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
 
 4. Change **n1**'s configuration *crate.yml*. The best practice is to select the node
    that was master, as then we know it had the latest version of the cluster state. For