message: Re-enable identity transpose removal across chains optimization in Grappler.
diff: @@ -1121,11 +1121,8 @@ class RemoveIdentityTranspose : public ArithmeticOptimizerStage {
  Status TrySimplify(NodeDef* node, string* simplified_node_name) override {
  TF_RETURN_IF_ERROR(EnsureNodeIsSupported(node));
  NodeDef* tail = node;
  - // TODO(rmlarsen): Enable after debugging breakage in Bayesflow.
  - if (ctx().opt_level == RewriterConfig::AGGRESSIVE) {
  tail = GetTailOfIdempotentChain(*tail, *ctx().node_map,
  *ctx().nodes_to_preserve);
  - }
  NodeDef* first_transpose;
  TF_RETURN_IF_ERROR(GetInputNode(tail->input(0), &first_transpose));
  