python3Packages.lightning: cleanup

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

@@ -1,10 +1,5 @@
 {
-  lib,
   buildPythonPackage,
-  fetchFromGitHub,
-
-  # build-system
-  setuptools,
 
   # dependencies
   pytorch-lightning,
@@ -32,7 +27,7 @@ buildPythonPackage {
     pytestCheckHook
   ];
 
-  # Some packages are not in NixPkgs; other tests try to build distributed
+  # Some packages are not in nixpkgs; other tests try to build distributed
   # models, which doesn't work in the sandbox.
   doCheck = false;