Remove unneeeded messages from sandbox message filter in the WebContent process on iOS.
<rdar://97993708>
Pull request: https://github.com/WebKit/WebKit/pull/3007
Committed 253111@main (9c9fd5cc9942): <https://commits.webkit.org/253111@main> Reviewed commits have been landed. Closing PR #3007 and removing active labels.
Re-opened since this is blocked by bug 245683