nodePackages.expo-cli: use .override

generate.sh seems to remove changes to node-env.nix, fortunately
.override seems to work so .overrideNodeAttrs does not actually
seem necessary. Not sure why I did not use it before.

pkgs/development/node-packages/default.nix

@@ -59,8 +59,7 @@ let
       buildInputs = [ pkgs.phantomjs2 ];
     };
 
-    expo-cli = super."expo-cli".overrideNodeAttrs (attrs: {
-      __acceptOverrideNodeAttrsCanBeDroppedAnytime = true;
+    expo-cli = super."expo-cli".override (attrs: {
       # The traveling-fastlane-darwin optional dependency aborts build on Linux.
       dependencies = builtins.filter (d: d.packageName != "@expo/traveling-fastlane-${if stdenv.isLinux then "darwin" else "linux"}") attrs.dependencies;
     });