Merge branch 'cleanup' into 'master'

.pre-commit-config.yaml

bob/learn/tensorflow/callbacks.py

bob/learn/tensorflow/data/__init__.py

bob/learn/tensorflow/data/generator.py

bob/learn/tensorflow/data/tfrecords.py

bob/learn/tensorflow/losses/__init__.py

bob/learn/tensorflow/losses/center_loss.py

bob/learn/tensorflow/metrics/__init__.py

bob/learn/tensorflow/models/__init__.py

bob/learn/tensorflow/models/alexnet.py

bob/learn/tensorflow/models/autoencoder_face.py

bob/learn/tensorflow/models/densenet.py

bob/learn/tensorflow/models/inception.py

bob/learn/tensorflow/models/inception_resnet_v1.py

bob/learn/tensorflow/models/inception_resnet_v2.py

bob/learn/tensorflow/models/lenet5.py

bob/learn/tensorflow/models/mine.py

bob/learn/tensorflow/models/msu_patch.py

bob/learn/tensorflow/models/simple_cnn.py

bob/learn/tensorflow/scripts/datasets_to_tfrecords.py