Remove RemoveAllTreeNodes, since it was a no-op IntermNode operator delete() or any of the IntermNode destructors don't do anything, since all the AST memory is allocated on the PoolAllocator. Because of this, RemoveAllTreeNodes was simply a no-op, and redundant with the PoolAllocator deallocation procedure, and could confuse people reading the code to think that IntermNodes should be deleted individually, when in fact this is not the case. BUG=angle:831 Change-Id: Ie1ccaa51986aabf267280d92a8e76ca9f97a19e5 Reviewed-on: https://chromium-review.googlesource.com/230730 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Olli Etuaho <oetuaho@nvidia.com>