Remove IE11 warning for CKEditor 5 in Drupal 10, since Drupal 10 does not support IE anyway

#3232550: Improve messaging about Internet Explorer 11 landed.

That looks … very thorough :D

This is RTBC IMHO.

But … I'd rather not get this committed immediately, because it will likely make the work on CKEditor 5 even more painful. We already need to target 3 branches, and frequently need to provide a different patch for the D10 branch. This will make that necessary more often.

As soon as this is green, I'm marking this "postponed" again and will RTBC in ~1.5 month.

Thanks so much, @longwave!

3 weeks later, many things that were in progress have landed.

I now think we can totally do this now, especially because it makes it clearer that #3260032: CKEditor 5 adds ie11.user.warnings library to every page, triggering a FOUC even for anonymous users only impacts Drupal 9.3 and 9.4.

Do you want to reroll and get this to green, @longwave? :)

That looks perfect to me :)

Looks just as good as when I RTBC'd it in #9 🤓

Sorry, @longwave 😬