Remove `@trustTypes`

[srujzs]

sdk/sdk/lib/js/_js_annotations.dart

Line 60 in 216eb0b

const _TrustTypes trustTypes = _TrustTypes();

This annotation was always communicated as experimental and be a bridge in performance in order to avoid unnecessary casts. It was used in Flutter early on, but is now no longer needed or used and should be removed. You can only import this annotation through package:js, which is now discontinued.

There's some clean up in our transformers we should do as well when we remove this annotation.