Remove Unix syscall sandbox telemetry in the WebContent process on macOS. We had a list of syscalls that were believed to only be used during launch of the WebContent process, but telemetry shows that all of these are also used after launch, so this telemetry can be removed now.
<rdar://problem/97790109>
Pull request: https://github.com/WebKit/WebKit/pull/2852
Committed 253036@main (ac691ca27ea8): <https://commits.webkit.org/253036@main> Reviewed commits have been landed. Closing PR #2852 and removing active labels.