diff --git a/official/projects/nhnet/evaluation.py b/official/projects/nhnet/evaluation.py
index 94aa221a03..eb256ca9b1 100644
--- a/official/projects/nhnet/evaluation.py
+++ b/official/projects/nhnet/evaluation.py
@@ -16,8 +16,6 @@
 
 import os
 
-# Import libraries
-
 from absl import logging
 import numpy as np
 import tensorflow as tf, tf_keras
diff --git a/official/projects/nhnet/trainer.py b/official/projects/nhnet/trainer.py
index 07191d228c..5836d06f94 100644
--- a/official/projects/nhnet/trainer.py
+++ b/official/projects/nhnet/trainer.py
@@ -16,8 +16,6 @@
 
 import os
 
-# Import libraries
-
 from absl import app
 from absl import flags
 from absl import logging
diff --git a/official/projects/qat/nlp/quantization/configs_test.py b/official/projects/qat/nlp/quantization/configs_test.py
index 09e9a2f481..390e4747c2 100644
--- a/official/projects/qat/nlp/quantization/configs_test.py
+++ b/official/projects/qat/nlp/quantization/configs_test.py
@@ -14,7 +14,6 @@
 
 """Tests for configs.py."""
 
-# Import libraries
 from absl.testing import parameterized
 
 import numpy as np
diff --git a/official/projects/qat/nlp/quantization/schemes.py b/official/projects/qat/nlp/quantization/schemes.py
index a30d708aac..a032baf2dd 100644
--- a/official/projects/qat/nlp/quantization/schemes.py
+++ b/official/projects/qat/nlp/quantization/schemes.py
@@ -13,8 +13,6 @@
 # limitations under the License.
 
 """Quantization schemes."""
-# Import libraries
-
 import numpy as np
 import tensorflow as tf, tf_keras
 
diff --git a/official/projects/qat/vision/modeling/heads/dense_prediction_heads.py b/official/projects/qat/vision/modeling/heads/dense_prediction_heads.py
index 547365f162..132b393795 100644
--- a/official/projects/qat/vision/modeling/heads/dense_prediction_heads.py
+++ b/official/projects/qat/vision/modeling/heads/dense_prediction_heads.py
@@ -15,8 +15,6 @@
 """Contains definitions of dense prediction heads."""
 from typing import List, Mapping, Union, Optional, Any, Dict
 
-# Import libraries
-
 import numpy as np
 import tensorflow as tf, tf_keras
 
diff --git a/official/projects/qat/vision/modeling/heads/dense_prediction_heads_test.py b/official/projects/qat/vision/modeling/heads/dense_prediction_heads_test.py
index 76f6672655..77f8ba47db 100644
--- a/official/projects/qat/vision/modeling/heads/dense_prediction_heads_test.py
+++ b/official/projects/qat/vision/modeling/heads/dense_prediction_heads_test.py
@@ -15,7 +15,6 @@
 # Lint as: python3
 """Tests for dense_prediction_heads.py."""
 
-# Import libraries
 from absl.testing import parameterized
 import numpy as np
 import tensorflow as tf, tf_keras
diff --git a/official/projects/qat/vision/quantization/configs_test.py b/official/projects/qat/vision/quantization/configs_test.py
index 7a974a63ef..bd139f899a 100644
--- a/official/projects/qat/vision/quantization/configs_test.py
+++ b/official/projects/qat/vision/quantization/configs_test.py
@@ -14,8 +14,6 @@
 
 """Tests for configs.py."""
 
-# Import libraries
-
 import numpy as np
 import tensorflow as tf, tf_keras
 
diff --git a/official/projects/qat/vision/quantization/schemes.py b/official/projects/qat/vision/quantization/schemes.py
index 589c096f33..47aae92561 100644
--- a/official/projects/qat/vision/quantization/schemes.py
+++ b/official/projects/qat/vision/quantization/schemes.py
@@ -13,8 +13,6 @@
 # limitations under the License.
 
 """Quantization schemes."""
-# Import libraries
-
 import tensorflow_model_optimization as tfmot
 from official.projects.qat.vision.quantization import layer_transforms
 
diff --git a/official/recommendation/create_ncf_data.py b/official/recommendation/create_ncf_data.py
index 281860a937..4073e272b2 100644
--- a/official/recommendation/create_ncf_data.py
+++ b/official/recommendation/create_ncf_data.py
@@ -17,7 +17,6 @@
 import json
 
 # pylint: disable=g-bad-import-order
-# Import libraries
 from absl import app
 from absl import flags
 import tensorflow as tf, tf_keras
diff --git a/official/recommendation/movielens.py b/official/recommendation/movielens.py
index 9f13a44d89..510a47efb3 100644
--- a/official/recommendation/movielens.py
+++ b/official/recommendation/movielens.py
@@ -27,7 +27,6 @@
 import zipfile
 
 # pylint: disable=g-bad-import-order
-# Import libraries
 import numpy as np
 import pandas as pd
 import six
diff --git a/official/vision/examples/starter/example_input.py b/official/vision/examples/starter/example_input.py
index 7783122ca7..0c4709f8d6 100644
--- a/official/vision/examples/starter/example_input.py
+++ b/official/vision/examples/starter/example_input.py
@@ -19,7 +19,6 @@
 format can be supported by implementing proper decoder and parser.
 """
 from typing import Mapping, List, Tuple
-# Import libraries
 import tensorflow as tf, tf_keras
 
 from official.vision.dataloaders import decoder
diff --git a/official/vision/examples/starter/example_model.py b/official/vision/examples/starter/example_model.py
index 6ba3a1d4cc..b6d462b06b 100644
--- a/official/vision/examples/starter/example_model.py
+++ b/official/vision/examples/starter/example_model.py
@@ -20,7 +20,6 @@
 """
 
 from typing import Any, Mapping
-# Import libraries
 import tensorflow as tf, tf_keras
 from official.vision.examples.starter import example_config as example_cfg
 
diff --git a/official/vision/losses/maskrcnn_losses.py b/official/vision/losses/maskrcnn_losses.py
index 086d6d318f..b37f989dbf 100644
--- a/official/vision/losses/maskrcnn_losses.py
+++ b/official/vision/losses/maskrcnn_losses.py
@@ -14,7 +14,6 @@
 
 """Losses for maskrcnn model."""
 
-# Import libraries
 import tensorflow as tf, tf_keras
 
 
diff --git a/official/vision/losses/retinanet_losses.py b/official/vision/losses/retinanet_losses.py
index 4a7aae5c89..08520a74e2 100644
--- a/official/vision/losses/retinanet_losses.py
+++ b/official/vision/losses/retinanet_losses.py
@@ -14,7 +14,6 @@
 
 """Losses used for detection models."""
 
-# Import libraries
 import tensorflow as tf, tf_keras