Remove TIntermRaw It's not used anywhere and removing it will make changing traversal code a bit simpler. BUG=angleproject:2662 TEST=angle_unittests Change-Id: I4a430a09ceb538c8b0e5d1bb0a95f3fd7657c276 Reviewed-on: https://chromium-review.googlesource.com/1098671 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>