message: Fix TensorBoard in Colab notebook for micro_speech example
diff: "source": [
  "# Replace Colab's default TensorFlow install with a more recent\n",
  "# build that contains the operations that are needed for training\n",
  - "!pip uninstall -y tensorflow tensorflow_estimator\n",
  + "!pip uninstall -y tensorflow tensorflow_estimator tensorboard\n",
  "!pip install -q tf-estimator-nightly==1.14.0.dev2019072901 tf-nightly-gpu==1.15.0.dev20190729"
  ],
  "execution_count": 0,
  