Remove obsolete comment from CapsExtension

smack-extensions/src/main/java/org/jivesoftware/smackx/caps/packet/CapsExtension.java

@@ -22,12 +22,6 @@ import org.jivesoftware.smack.util.XmlStringBuilder;
 
 /**
  * A XEP-0115 Entity Capabilities extension.
- * <p>
- * Note that this is currently in smack-core as it's a potential stream feature.
- * TODO: In feature versions of Smack, it should be possible to register
- * "providers" for stream features too, so that this class can be moved back to
- * smack-extensions.
- * </p>
  */
 public class CapsExtension implements PacketExtension {
     public static final String NAMESPACE = "http://jabber.org/protocol/caps";