Drop redundant [AtomString] on attributes marked as [Reflect] already. All attributes of string types and marked as [Reflect] now use AtomString automatically, without having to specify it in the IDL.
Pull request: https://github.com/WebKit/WebKit/pull/538
Committed r293918 (250365@main): <https://commits.webkit.org/250365@main> Reviewed commits have been landed. Closing PR #538 and removing active labels.
<rdar://problem/92874674>