Commented out debug timer

Author: jisedlac

visualvm/heapviewer/src/org/graalvm/visualvm/heapviewer/model/HeapViewerNode.java

@@ -160,7 +160,7 @@ protected HeapViewerNode[] computeChildren(final RootNode root) {
 
         SwingWorker<HeapViewerNode[], HeapViewerNode[]> worker = new SwingWorker<HeapViewerNode[], HeapViewerNode[]>() {
             protected HeapViewerNode[] doInBackground() throws Exception {
-                long t = System.currentTimeMillis();
+//                long t = System.currentTimeMillis();
                 synchronized (HeapViewerNode.this) {
                     if (currentWorker != null) {
                         currentWorker.interrupt();