message: Migrate the code to PY3 only.
diff: @@ -203,6 +203,7 @@ pybind_extension(
  hdrs = ["py_tflite_registerer.h"],
  additional_exported_symbols = ["TFLite_SentencepieceTokenizerRegisterer"],
  module_name = "pywrap_tflite_registerer",
  + srcs_version = "PY3ONLY",
  deps = [
  ":py_tflite_registerer",
  "@local_config_python//:python_headers",
  