Update method.py

Author: BobTheBuidler

web3/method.py

@@ -182,7 +182,7 @@ def __call__(self, *args: Any, **kwargs: Any) -> Any:
     @property
     def method_selector_fn(
         self,
-    ) -> Callable[..., Union[RPCEndpoint, Callable[..., RPCEndpoint]]]:
+    ) -> Callable[..., RPCEndpoint]:
         """Gets the method selector from the config."""
         if callable(self.json_rpc_method):
             return self.json_rpc_method