Remove notify option NOTIFY_OPT_LOOPBACK in WebKit, since this can now be enable with an entitlement.
<rdar://problem/126484077>
Pull request: https://github.com/WebKit/WebKit/pull/27516
Committed 278639@main (e57afcae14d0): <https://commits.webkit.org/278639@main> Reviewed commits have been landed. Closing PR #27516 and removing active labels.
Re-opened since this is blocked by bug 274037
Pull request: https://github.com/WebKit/WebKit/pull/28744
rdar://128307652
Committed 278942@main (c934cb5ebbd2): <https://commits.webkit.org/278942@main> Reviewed commits have been landed. Closing PR #28744 and removing active labels.