Remove stale comment about Node::insertBefore and friends

It was added in 2006 <https://trac.webkit.org/changeset/12568> and was
accurate at the time.

Review URL: https://codereview.chromium.org/939303004

git-svn-id: svn://svn.chromium.org/blink/trunk@190721 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed
tree: ced9b434631700ab557459ab9b2a1a748f3df434
  1. third_party/