Remove TODO

Author: DaveCTurner

server/src/test/java/org/elasticsearch/cluster/coordination/PeerFinderTests.java

@@ -119,7 +119,7 @@ public void run() {
                                 listener.onResponse(discoveryNode);
                                 return;
                             } else {
-                                listener.onFailure(new ElasticsearchException("non-master node " + discoveryNode)); // TODO better exception
+                                listener.onFailure(new ElasticsearchException("non-master node " + discoveryNode));
                                 return;
                             }
                         }