Add deprecation notice to Colabs and update the README file.

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 Add deprecation notice to Colabs.
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PiperOrigin-RevId: 660557217
Change-Id: I74dbe17d5444918df658729318f35a4d8c72cd3f

tensorflow_gan/examples/colab_notebooks/README.md

@@ -3,28 +3,4 @@
 ### How to run
 
 
-You can run the introductory tutorial Colab notebook
-[here](https://github.com/tensorflow/gan/tree/master/tensorflow_gan/examples/colab_notebooks/tfgan_tutorial.ipynb).
-You can run the cloud TPU Colab notebook
-[here](https://github.com/tensorflow/gan/tree/master/tensorflow_gan/examples/colab_notebooks/tfgan_on_tpus.ipynb).
-
-### Description
-
-#### TF-GAN Tutorial
-
-Author: Joel Shor, David Westbrook
-
-This Colab notebook introduces TF-GAN's `GANEstimator`.
-The estimator framework abstracts the training details so
-you can focus on the details that matter.
-
-#### TF-GAN on Cloud TPUs Tutorial
-
-Author: Tom Brown, Joel Shor, David Westbrook
-
-This Colab notebook shows you how to use
-TF-GAN's `TPUGANEstimator` to train GANs on Google's cloud TPU. This
-infrastructure gives you unprecedented compute power and batch size. In
-less than **five minutes**, you can train an unconditional GAN on CIFAR10.
-
-<img src="images/cifar_cloudtpu.png" title="GAN on Cloud TPU" width="330"/>
+These Colabs were deprecated on August 2024.