treewide: remove unused with statements from maintainer lists

$ find -type f -name '*.nix' -print0 | xargs -P "$(nproc)" -0 sed -i \
  -e 's!with lib.maintainers; \[ *\];![ ];!' \
  -e 's!with maintainers; \[ *\];![ ];!'

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

@@ -100,7 +100,7 @@ lib.fix (
       homepage = "https://gitlab.freedesktop.org/dbus/dbus-python";
       license = licenses.mit;
       platforms = dbus.meta.platforms;
-      maintainers = with maintainers; [ ];
+      maintainers = [ ];
     };
   }
 )