Cleanup for PY3.

PiperOrigin-RevId: 339180185

official/modeling/activations/gelu_test.py

@@ -14,10 +14,6 @@
 # ==============================================================================
 """Tests for the Gaussian error linear unit."""
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-
 import tensorflow as tf
 
 from tensorflow.python.keras import keras_parameterized  # pylint: disable=g-direct-tensorflow-import

official/modeling/activations/swish.py

@@ -14,10 +14,6 @@
 # ==============================================================================
 """Customized Swish activation."""
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-
 import tensorflow as tf
 
 

official/modeling/activations/swish_test.py

@@ -13,11 +13,6 @@
 # limitations under the License.
 # ==============================================================================
 """Tests for the customized Swish activation."""
-
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-
 import numpy as np
 import tensorflow as tf
 

official/modeling/hyperparams/params_dict.py

@@ -14,10 +14,6 @@
 # ==============================================================================
 """A parameter dictionary class which supports the nest structure."""
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-
 import collections
 import copy
 import re

official/modeling/tf_utils.py

@@ -14,10 +14,6 @@
 # ==============================================================================
 """Common TF utilities."""
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-
 import six
 import tensorflow as tf
 

official/nlp/modeling/losses/weighted_sparse_categorical_crossentropy.py

@@ -14,11 +14,6 @@
 # ==============================================================================
 """Weighted sparse categorical cross-entropy losses."""
 
-from __future__ import absolute_import
-from __future__ import division
-# from __future__ import google_type_annotations
-from __future__ import print_function
-
 import tensorflow as tf
 
 

official/nlp/modeling/losses/weighted_sparse_categorical_crossentropy_test.py

@@ -13,11 +13,6 @@
 # limitations under the License.
 # ==============================================================================
 """Tests for masked LM loss."""
-
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-
 import numpy as np
 
 import tensorflow as tf

official/nlp/optimization.py

@@ -13,9 +13,6 @@
 # limitations under the License.
 # ==============================================================================
 """Functions and classes related to optimization (weight updates)."""
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 import re