Redundant JS in index.html when no feature flags are enabled

[Legioth]

Description of the bug

Even if no feature flags are enabled, there's still some related JavaScript in the production index HTML document that doesn't really seem to serve any purpose:

window.Vaadin = window.Vaadin || {};
window.Vaadin.featureFlagsUpdaters = window.Vaadin.featureFlagsUpdaters || [];
window.Vaadin.featureFlagsUpdaters.push((activator) => {
});

Expected behavior

Expected to not have anything about features flags in the HTML if no feature flags are enabled.

Minimal reproducible example

1. Run your favorite app without feature flags enabled in production mode
2. Check the index HTML payload

Versions

• Vaadin / Flow version: 25.1.3