Update conditionals that reference WK_MACOS_1013 and suffixes like _MACOS_SINCE_1013, assuming that we're always building on 10.13 or later and that these conditionals are always True or False.
<rdar://problem/54759985>
See also Bug 200694 for Part 1
Created attachment 377370 [details] Patch
Comment on attachment 377370 [details] Patch Clearing flags on attachment: 377370 Committed r249208: <https://trac.webkit.org/changeset/249208>
All reviewed patches have been landed. Closing bug.