message: Remove stale TODO in TFLite
  The usage of subgraph_test_util is a bit widespread
  now, and it's used for non-control flow use cases.
  The TODO no longer makes sense.
diff: @@ -32,9 +32,6 @@ limitations under the License.
  namespace tflite {
  namespace subgraph_test_util {
  -// TODO(ycling): This file should be renamed as
  -// `control_flow_test_util` to avoid confusion. I'll do it immediately
  -// in a separated change.
  class SubgraphBuilder {
  public:
  ~SubgraphBuilder();
  