CLN: Use deprecate_kwarg to deprecate kwargs

Author: dahlbaek

pandas/core/series.py

@@ -2878,6 +2878,7 @@ def from_csv(cls, path, sep=',', parse_dates=True, header=None,
 
         return result
 
+    @deprecate_kwarg(old_arg_name='path', new_arg_name='path_or_buf')
     def to_csv(self, path_or_buf=None, index=True, sep=",", na_rep='',
                float_format=None, header=False, index_label=None,
                mode='w', encoding=None, compression=None, date_format=None,
@@ -2936,8 +2937,6 @@ def to_csv(self, path_or_buf=None, index=True, sep=",", na_rep='',
 
         # convert to DataFrame
         df = self.to_frame()
-        # ensure backwards compatibility with path argument
-        path_or_buf = kwargs.pop('path', path_or_buf)
         # result is only a string if no path_or_buf provided, otherwise None
         result = df.to_csv(path_or_buf, index=index, sep=sep, na_rep=na_rep,
                            float_format=float_format, header=header,