The dyld shared cache moved to /System/Library/dyld (from the old /private/var/db/dyld path). We should not retain this rule in modern macOS builds since it isn't needed.
<rdar://problem/66580290>
Created attachment 439887 [details] Patch
Comment on attachment 439887 [details] Patch R=me.
Committed r283396 (242400@main): <https://commits.webkit.org/242400@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 439887 [details].