remove meaningless encoding parameter from convert_file

Signed-off-by: Christian Decker <christian.decker@homag.com>

pypandoc/__init__.py

@@ -95,7 +95,7 @@ def convert_text(source:str, to:str, format:str, extra_args:Iterable=(), encodin
 
 
 def convert_file(source_file:Union[list, str, Path, Generator], to:str, format:Union[str, None]=None,
-                 extra_args:Iterable=(), encoding:str='utf-8', outputfile:Union[None, str, Path]=None,
+                 extra_args:Iterable=(), outputfile:Union[None, str, Path]=None,
                  filters:Union[Iterable, None]=None, verify_format:bool=True, sandbox:bool=False,
                  cworkdir:Union[str, None]=None) -> str:
     """Converts given `source` from `format` to `to`.
@@ -116,8 +116,6 @@ def convert_file(source_file:Union[list, str, Path, Generator], to:str, format:U
     :param list extra_args: extra arguments (list of strings) to be passed to pandoc
             (Default value = ())
 
-    :param str encoding: the encoding of the file or the input bytes (Default value = 'utf-8')
-
     :param str outputfile: output will be written to outputfile or the converted content
             returned if None. The output filename can be specified as a string
             or pathlib.Path object. (Default value = None)