[dartpad_ui] Is the --disable-web-security flag still needed?

[Levi-Lesches]

The README for pkgs/dartpad_ui says:

How to run

To run this locally, run:

flutter run -d chrome --web-browser-flag "--disable-web-security"

We pass the --disable-web-security flag to Chrome as we're not able to
configure the flutter run web server to pass CORS headers for
AssetManifest.json, FontManifest.json, and other resources.

Running without those flags (just flutter run -d chrome) works fine, and I can even connect to the localhost channel when running the server.

It seems this section is out-of-date and can be removed?