python2Packages.buildPythonPackage: passthru disabled

Port to python2/mk-python-derivation.nix commit 8fd082ed7f
("mk-python-derivation: passthru disabled").

Co-authored-by: Peder Bergebakken Sundt <pbsds@hotmail.com>

pkgs/development/interpreters/python/python2/mk-python-derivation.nix

@@ -273,6 +273,9 @@ let
         outputs = outputs ++ lib.optional withDistOutput "dist";
 
         passthru = {
+          inherit
+            disabled
+            ;
           updateScript =
             let
               filename = builtins.head (lib.splitString ":" self.meta.position);