Clean up comments and improve focumentation in arrow_parser_wrapper.py

Author: Lavishgangwani

pandas/io/parsers/arrow_parser_wrapper.py

@@ -276,14 +276,11 @@ def read(self) -> DataFrame:
 
         # Handle missing date values by checking for timestamp columns
         for i, field in enumerate(table.schema):
-            if pa.types.is_timestamp(field.type):  # Check if the column is a timestamp
-                # Convert to a Pandas Series
+            if pa.types.is_timestamp(field.type):
                 column = table.column(i).to_pandas()
 
-                # Replace missing values with NaT
                 column.fillna(pd.NaT, inplace=True)
 
-                # Update the column back to the table
                 table = table.set_column(i, field.name, pa.array(column))
 
         # Convert all pa.null() cols -> float64 (non nullable)