Remove symbols in WebKitTargetConditionals.xcconfig related to macOS 10.13, including WK_MACOS_1013 and WK_MACOS_BEFORE_1013, and suffixes like _MACOS_SINCE_1013.
<rdar://problem/54795934>
Created attachment 377458 [details] Patch
Those build failures were because this patch relied on a previous patch having first landed. I had jumped the gun and that previous patch was still in the commit queue and not yet landed. I'm uploading this patch again now that the previous patch has actually landed.
Created attachment 377504 [details] Patch
Comment on attachment 377504 [details] Patch Clearing flags on attachment: 377504 Committed r249286: <https://trac.webkit.org/changeset/249286>
All reviewed patches have been landed. Closing bug.