Remove strange focusable check

This strange check seems to imply that being focusable would make it
more likely for a node to be ignored.

Bug: None
Change-Id: I57fbdab2ece01294af78158b3f2b3400ff5d811e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2113680Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#752554}

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

@@ -728,7 +728,7 @@ bool AXLayoutObject::ComputeAccessibilityIsIgnored(
   // are usually dummy layout objects that pad out the tree, but there are
   // some exceptions below.
   auto* block_flow = DynamicTo<LayoutBlockFlow>(*layout_object_);
-  if (block_flow && block_flow->ChildrenInline() && !CanSetFocusAttribute()) {
+  if (block_flow && block_flow->ChildrenInline()) {
     // If the layout object has any plain text in it, that text will be
     // inside a LineBox, so the layout object will have a first LineBox.
     bool has_any_text = HasLineBox(*block_flow);