[Cocoa] Remove all features from FeatureDefines.xcconfig that are already mentioned in PlatformEnableCocoa.h
Created attachment 403531 [details] Patch
Committed r263947: <https://trac.webkit.org/changeset/263947> All reviewed patches have been landed. Closing bug and clearing flags on attachment 403531 [details].
<rdar://problem/65099040>