remove unused dep

Author: dxdc

pandas/io/parsers/arrow_parser_wrapper.py

@@ -62,8 +62,6 @@ def _get_pyarrow_options(self) -> None:
         """
         Rename some arguments to pass to pyarrow
         """
-        pa = import_optional_dependency("pyarrow")
-
         mapping = {
             "usecols": "include_columns",
             "na_values": "null_values",