Remove unnecessary condition

Image <map> already disallows children via CanHaveChildren().

Bug: None
Change-Id: I156f1f33e5864eb5459ccaf252d5afb34cb1329a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2100488Reviewed-by: Nektarios Paisios <nektar@chromium.org>
Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#749677}

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

@@ -2158,10 +2158,6 @@ bool AXLayoutObject::ShouldUseDOMTraversal() const {
   if (!node)
     return false;
 
-  // <map>: Handled in AddImageMapChildren (img).
-  if (IsA<HTMLMapElement>(*node))
-    return false;
-
   // <ruby>: special layout handling
   if (IsA<HTMLRubyElement>(*node))
     return false;