fe343d8d96
This is follow-up from [an earlier discussion](https://github.com/angular/angular/pull/39408#discussion_r511908358). After some testing, it looks like the type of `Element.attributes` was correct in specifying that it only has `TextAttribute` instances. This means that the extra checks that filter out `BoundAttribute` instances from the array isn't necessary. There is another loop a bit further down that actually extracts the bound i18n attributes. PR Close #39498