Temporarily revert build_docs.py `private_map`, until next pip release, so that private classes don't all show up.
Temporarily revert build_docs.py `private_map`, until next pip release, so that
private classes don't all show up.

Add `compat` to `private_map` until then.

PiperOrigin-RevId: 319143321

tensorflow/model-optimization,tensorflow/model-optimization