chore: fix mypy err

Author: BobTheBuidler

web3/module.py

@@ -85,6 +85,8 @@ def retrieve_request_information_for_batching(
     Callable[..., Tuple[RequestArgs, ResponseFormatters[Any]]],
     Callable[..., Coroutine[Any, Any, Tuple[RequestArgs, ResponseFormatters[Any]]]],
 ]:
+    response_formatters: ResponseFormatters[Any]
+    
     async def async_inner(
         *args: Any, **kwargs: Any
     ) -> Tuple[RequestArgs, ResponseFormatters[Any]]: