diff --git a/python/pyspark/ml/base.py b/python/pyspark/ml/base.py
index 20540ebbef65..34c3aa9c62cf 100644
--- a/python/pyspark/ml/base.py
+++ b/python/pyspark/ml/base.py
@@ -110,8 +110,6 @@ class Estimator(Params, Generic[M], metaclass=ABCMeta):
     .. versionadded:: 1.3.0
     """
 
-    pass
-
     @abstractmethod
     def _fit(self, dataset: DataFrame) -> M:
         """
@@ -220,8 +218,6 @@ class Transformer(Params, metaclass=ABCMeta):
     .. versionadded:: 1.3.0
     """
 
-    pass
-
     @abstractmethod
     def _transform(self, dataset: DataFrame) -> DataFrame:
         """
diff --git a/python/pyspark/ml/evaluation.py b/python/pyspark/ml/evaluation.py
index ff0e5b91e424..19d123debaea 100644
--- a/python/pyspark/ml/evaluation.py
+++ b/python/pyspark/ml/evaluation.py
@@ -67,8 +67,6 @@ class Evaluator(Params, metaclass=ABCMeta):
     .. versionadded:: 1.4.0
     """
 
-    pass
-
     @abstractmethod
     def _evaluate(self, dataset: DataFrame) -> float:
         """
diff --git a/python/pyspark/tests/test_worker.py b/python/pyspark/tests/test_worker.py
index 0fdf6adb031b..06ada8f81d55 100644
--- a/python/pyspark/tests/test_worker.py
+++ b/python/pyspark/tests/test_worker.py
@@ -70,7 +70,6 @@ def run():
                 try:
                     daemon_pid, worker_pid = map(int, data)
                 except ValueError:
-                    pass
                     # In case the value is not written yet.
                     cnt += 1
                     if cnt == 10: