JENKINS-37566 - Modification of Channel#dumpDiagnostics() actually is…

… not required after the merge of jenkinsci#122

src/main/java/hudson/remoting/Channel.java

@@ -1244,8 +1244,7 @@ public void dumpDiagnostics(@Nonnull PrintWriter w) throws IOException {
  w.printf(" Last command sent=%s%n", new Date(lastCommandSentAt));
  w.printf(" Last command received=%s%n", new Date(lastCommandReceivedAt));
 
- // TODO: Update after the merge to 3.x branch, where the Hashtable is going to be replaced as a part of
- // https://github.com/jenkinsci/remoting/pull/109
+ // TODO: Synchronize when Hashtable gets replaced by a modern collection.
  w.printf(" Pending calls=%d%n", pendingCalls.size());
  }