Proto commits in tensorflow/hub

These 4 commits are when the Protocol Buffers files have changed:

Commit:f74a32b
Author:TensorFlow Hub Authors
Committer:Copybara-Service

Remove deprecated TF 1 API PiperOrigin-RevId: 583948832

The documentation is generated from this commit.

Commit:acdacbd
Author:TensorFlow Hub Authors
Committer:vbardiovsky

Let get_expected_image_size() use an attached message "image_module_info" if present. With that, the height and width dimensions of the input shape can become variable, for those modules that can handle variable-sized inputs. PiperOrigin-RevId: 208650929

Commit:665212c
Author:TensorFlow Hub Authors
Committer:vbardiovsky

Add hub.attach_message() and Module{,Spec}.get_attached_message(). PiperOrigin-RevId: 208215298

Commit:2461920
Author:TensorFlow Hub Authors
Committer:André Susano Pinto

Project import generated by Copybara. PiperOrigin-RevId: 189006547