Remove unused code

Layout is always clean here.

Bug: None
Change-Id: I5e45083d0be1ac99bd25bbc183dbeb6126c83db2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2438689
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812325}

third_party/blink/renderer/modules/accessibility/ax_object_cache_impl.cc

@@ -1306,12 +1306,6 @@ void AXObjectCacheImpl::ChildrenChangedWithCleanLayout(Node* node) {
   if (!node)
     return;
 
-#ifndef NDEBUG
-  if (node->GetDocument().NeedsLayoutTreeUpdateForNode(*node)) {
-    LOG(ERROR) << "Node needs layout tree update: " << node;
-    node->ShowTreeForThisAcrossFrame();
-  }
-#endif
   DCHECK(!node->GetDocument().NeedsLayoutTreeUpdateForNode(*node));
 
   ChildrenChangedWithCleanLayout(node, Get(node));