address comment

python/pyspark/sql/streaming/stateful_processor.py

@@ -125,7 +125,7 @@ def init(self, handle: StatefulProcessorHandle) -> None:
             Handle to the stateful processor that provides access to the state store and other
             stateful processing related APIs.
         """
-        pass
+        ...
 
     @abstractmethod
     def handleInputRows(
@@ -149,12 +149,12 @@ def handleInputRows(
         rows : iterable of :class:`pandas.DataFrame`
             iterator of input rows associated with grouping key
         """
-        pass
+        ...
 
     @abstractmethod
     def close(self) -> None:
         """
         Function called as the last method that allows for users to perform any cleanup or teardown
         operations.
         """
-        pass
+        ...