diff --git a/tensorflow_probability/python/mcmc/diagnostic_test.py b/tensorflow_probability/python/mcmc/diagnostic_test.py
index 4fff448786..59495c52d0 100644
--- a/tensorflow_probability/python/mcmc/diagnostic_test.py
+++ b/tensorflow_probability/python/mcmc/diagnostic_test.py
@@ -14,8 +14,6 @@
 # ============================================================================
 """Tests for MCMC diagnostic utilities."""
 
-# Dependency imports
-
 import numpy as np
 import tensorflow.compat.v1 as tf1
 import tensorflow.compat.v2 as tf
diff --git a/tensorflow_probability/python/mcmc/dual_averaging_step_size_adaptation_test.py b/tensorflow_probability/python/mcmc/dual_averaging_step_size_adaptation_test.py
index 531c75c318..48516a2269 100644
--- a/tensorflow_probability/python/mcmc/dual_averaging_step_size_adaptation_test.py
+++ b/tensorflow_probability/python/mcmc/dual_averaging_step_size_adaptation_test.py
@@ -17,8 +17,6 @@
 import collections
 import functools
 
-# Dependency imports
-
 from absl.testing import parameterized
 import numpy as np
 import tensorflow.compat.v1 as tf1
diff --git a/tensorflow_probability/python/mcmc/eight_schools_hmc.py b/tensorflow_probability/python/mcmc/eight_schools_hmc.py
index 587474f6d9..2c900a9c58 100644
--- a/tensorflow_probability/python/mcmc/eight_schools_hmc.py
+++ b/tensorflow_probability/python/mcmc/eight_schools_hmc.py
@@ -15,7 +15,6 @@
 """Shared library for `eight_schools_hmc_{graph,eager}_test.py`."""
 
 import time
-# Dependency imports
 import numpy as np
 import tensorflow.compat.v1 as tf1
 import tensorflow.compat.v2 as tf
diff --git a/tensorflow_probability/python/mcmc/hmc_test.py b/tensorflow_probability/python/mcmc/hmc_test.py
index 246e1426bb..d3c10758d8 100644
--- a/tensorflow_probability/python/mcmc/hmc_test.py
+++ b/tensorflow_probability/python/mcmc/hmc_test.py
@@ -17,8 +17,6 @@
 import collections
 import warnings
 
-# Dependency imports
-
 from absl import logging
 from absl.testing import parameterized
 import numpy as np
diff --git a/tensorflow_probability/python/mcmc/langevin.py b/tensorflow_probability/python/mcmc/langevin.py
index eef3e17240..dc6bd9e419 100644
--- a/tensorflow_probability/python/mcmc/langevin.py
+++ b/tensorflow_probability/python/mcmc/langevin.py
@@ -15,8 +15,6 @@
 """Metropolis-adjusted Langevin algorithm, a gradient-based MCMC algorithm."""
 
 import collections
-# Dependency imports
-
 import tensorflow.compat.v2 as tf
 
 from tensorflow_probability.python.internal import distribute_lib
diff --git a/tensorflow_probability/python/mcmc/langevin_test.py b/tensorflow_probability/python/mcmc/langevin_test.py
index b47808de77..19f2386562 100644
--- a/tensorflow_probability/python/mcmc/langevin_test.py
+++ b/tensorflow_probability/python/mcmc/langevin_test.py
@@ -14,8 +14,6 @@
 # ============================================================================
 """Tests for MetropolisAdjustedLangevinAlgorithm."""
 
-# Dependency imports
-
 import numpy as np
 import tensorflow.compat.v2 as tf
 from tensorflow_probability.python.distributions import mvn_tril
diff --git a/tensorflow_probability/python/mcmc/metropolis_hastings_test.py b/tensorflow_probability/python/mcmc/metropolis_hastings_test.py
index 59a2f179af..4b69042867 100644
--- a/tensorflow_probability/python/mcmc/metropolis_hastings_test.py
+++ b/tensorflow_probability/python/mcmc/metropolis_hastings_test.py
@@ -16,7 +16,6 @@
 
 import collections
 import warnings
-# Dependency imports
 import numpy as np
 
 import tensorflow.compat.v2 as tf
diff --git a/tensorflow_probability/python/mcmc/random_walk_metropolis.py b/tensorflow_probability/python/mcmc/random_walk_metropolis.py
index efd9f2f853..f55350a30d 100644
--- a/tensorflow_probability/python/mcmc/random_walk_metropolis.py
+++ b/tensorflow_probability/python/mcmc/random_walk_metropolis.py
@@ -15,8 +15,6 @@
 """Random Walk Metropolis (RWM) Transition Kernel."""
 
 import collections
-# Dependency imports
-
 import tensorflow.compat.v2 as tf
 
 from tensorflow_probability.python.internal import distribute_lib
diff --git a/tensorflow_probability/python/mcmc/random_walk_metropolis_test.py b/tensorflow_probability/python/mcmc/random_walk_metropolis_test.py
index 834facbaca..7d23b29224 100644
--- a/tensorflow_probability/python/mcmc/random_walk_metropolis_test.py
+++ b/tensorflow_probability/python/mcmc/random_walk_metropolis_test.py
@@ -14,8 +14,6 @@
 # ============================================================================
 """Tests for RandomWalkMetropolis."""
 
-# Dependency imports
-
 import numpy as np
 import tensorflow.compat.v1 as tf1
 import tensorflow.compat.v2 as tf
diff --git a/tensorflow_probability/python/mcmc/sample_annealed_importance.py b/tensorflow_probability/python/mcmc/sample_annealed_importance.py
index c7fb8f4681..2708a1a236 100644
--- a/tensorflow_probability/python/mcmc/sample_annealed_importance.py
+++ b/tensorflow_probability/python/mcmc/sample_annealed_importance.py
@@ -15,7 +15,6 @@
 """Markov chain Monte Carlo driver, `sample_chain_annealed_importance_chain`."""
 
 import collections
-# Dependency imports
 import numpy as np
 
 import tensorflow.compat.v2 as tf
diff --git a/tensorflow_probability/python/mcmc/sample_annealed_importance_test.py b/tensorflow_probability/python/mcmc/sample_annealed_importance_test.py
index 72fa9f62e1..b4714bda8b 100644
--- a/tensorflow_probability/python/mcmc/sample_annealed_importance_test.py
+++ b/tensorflow_probability/python/mcmc/sample_annealed_importance_test.py
@@ -16,8 +16,6 @@
 
 import collections
 
-# Dependency imports
-
 from absl.testing import parameterized
 import numpy as np
 import tensorflow.compat.v1 as tf1
diff --git a/tensorflow_probability/python/mcmc/sample_halton_sequence_lib.py b/tensorflow_probability/python/mcmc/sample_halton_sequence_lib.py
index c767ed2fba..472ffb9a0f 100644
--- a/tensorflow_probability/python/mcmc/sample_halton_sequence_lib.py
+++ b/tensorflow_probability/python/mcmc/sample_halton_sequence_lib.py
@@ -14,7 +14,6 @@
 # ============================================================================
 """Quasi Monte Carlo support: Halton sequence."""
 
-# Dependency imports
 import numpy as np
 
 import tensorflow.compat.v2 as tf
diff --git a/tensorflow_probability/python/mcmc/sample_halton_sequence_test.py b/tensorflow_probability/python/mcmc/sample_halton_sequence_test.py
index 0776dbc5cf..dd3f279aee 100644
--- a/tensorflow_probability/python/mcmc/sample_halton_sequence_test.py
+++ b/tensorflow_probability/python/mcmc/sample_halton_sequence_test.py
@@ -14,8 +14,6 @@
 # ============================================================================
 """Tests for sample_halton_sequence_lib.py."""
 
-# Dependency imports
-
 import numpy as np
 import tensorflow.compat.v2 as tf
 from tensorflow_probability.python.distributions import normal
diff --git a/tensorflow_probability/python/mcmc/sample_test.py b/tensorflow_probability/python/mcmc/sample_test.py
index 41634a040f..a08f5856fd 100644
--- a/tensorflow_probability/python/mcmc/sample_test.py
+++ b/tensorflow_probability/python/mcmc/sample_test.py
@@ -17,7 +17,6 @@
 import collections
 import warnings
 
-# Dependency imports
 from absl.testing import parameterized
 import numpy as np
 import tensorflow.compat.v2 as tf
diff --git a/tensorflow_probability/python/mcmc/simple_step_size_adaptation_test.py b/tensorflow_probability/python/mcmc/simple_step_size_adaptation_test.py
index 02c9364bb5..6c64dd2a3b 100644
--- a/tensorflow_probability/python/mcmc/simple_step_size_adaptation_test.py
+++ b/tensorflow_probability/python/mcmc/simple_step_size_adaptation_test.py
@@ -17,8 +17,6 @@
 import collections
 import functools
 
-# Dependency imports
-
 from absl.testing import parameterized
 import numpy as np
 import tensorflow.compat.v1 as tf1
diff --git a/tensorflow_probability/python/mcmc/slice_sampler_kernel.py b/tensorflow_probability/python/mcmc/slice_sampler_kernel.py
index cb849c87e2..ecce833774 100644
--- a/tensorflow_probability/python/mcmc/slice_sampler_kernel.py
+++ b/tensorflow_probability/python/mcmc/slice_sampler_kernel.py
@@ -15,8 +15,6 @@
 """Slice sampler transition kernel."""
 
 import collections
-# Dependency imports
-
 import tensorflow.compat.v2 as tf
 
 from tensorflow_probability.python.internal import distribute_lib
diff --git a/tensorflow_probability/python/mcmc/transformed_kernel_test.py b/tensorflow_probability/python/mcmc/transformed_kernel_test.py
index c7f36bc333..276975c02a 100644
--- a/tensorflow_probability/python/mcmc/transformed_kernel_test.py
+++ b/tensorflow_probability/python/mcmc/transformed_kernel_test.py
@@ -16,8 +16,6 @@
 
 import collections
 
-# Dependency imports
-
 import numpy as np
 import tensorflow.compat.v2 as tf
 from tensorflow_probability.python.bijectors import chain as chain_lib