python.pkgs.asyncio: remove

> This version is only relevant for Python 3.3,
> which does not include asyncio in its stdlib.
We don't ship 3.3 anymore.

pkgs/development/python-modules/aiofiles/default.nix

@@ -1,10 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, isPy33
 , pythonOlder
-, asyncio
-, singledispatch
 }:
 
 buildPythonPackage rec {
@@ -18,8 +15,6 @@ buildPythonPackage rec {
 
   disabled = pythonOlder "3.3";
 
-  propagatedBuildInputs = lib.optionals isPy33 [ asyncio singledispatch ];
-
   # No tests in archive
   doCheck = false;