Remove old crazy comment + fixme

Things that make you go 'WAT.' This comment was added in the patch
that split RenderBoxModelObject out of RenderBox --
eb6efbfaa79de8624ce72ad4e26ef0d3f808650e -- without any additional
explanation. I don't think it's helping anyone.

H/T to Ojan for finding today's WAT.

Review URL: https://codereview.chromium.org/718843002

git-svn-id: svn://svn.chromium.org/blink/trunk@185151 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/rendering/RenderObject.cpp

@@ -2918,10 +2918,6 @@ Element* RenderObject::offsetParent() const
     if (isOutOfFlowPositioned() && style()->position() == FixedPosition)
         return 0;
 
-    // If A is an area HTML element which has a map HTML element somewhere in the ancestor
-    // chain return the nearest ancestor map HTML element and stop this algorithm.
-    // FIXME: Implement!
-
     float effectiveZoom = style()->effectiveZoom();
     Node* node = 0;
     for (RenderObject* ancestor = parent(); ancestor; ancestor = ancestor->parent()) {