Update freezable_sync_batch_norm.py

[ZoeyZiyunWang]

This code is not compatible with the newest version of Tensorflow (2.16.1). Therefore I Replace the line: "class FreezableSyncBatchNorm(tf.keras.layers.experimental.SyncBatchNormalization):" With: "class FreezableSyncBatchNorm(tf.keras.layers.BatchNormalization):" to make it compatible with the newest Tenserflow version (2.16.1).

Description

:memo: Please include a summary of the change.

• Please also include relevant motivation and context.
• List any dependencies that are required for this change.

Type of change

For a new feature or function, please create an issue first to discuss it with us before submitting a pull request.

Note: Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] Documentation update
• [ ] TensorFlow 2 migration
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] A new research paper code implementation
• [ ] Other (Specify)

Tests

:memo: Please describe the tests that you ran to verify your changes.

• Provide instructions so we can reproduce.
• Please also list any relevant details for your test configuration.

Test Configuration:

Checklist

• [ ] I have signed the Contributor License Agreement.
• [ ] I have read guidelines for pull request.
• [ ] My code follows the coding guidelines.
• [ ] I have performed a self code review of my own code.
• [ ] I have commented my code, particularly in hard-to-understand areas.
• [ ] I have made corresponding changes to the documentation.
• [ ] My changes generate no new warnings.
• [ ] I have added tests that prove my fix is effective or that my feature works.

[google-cla[bot]]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.