Remove property-delegate handling code

Author: benlangmuir

lib/Index/Index.cpp

@@ -361,9 +361,6 @@ class IndexSwiftASTWalker : public SourceEntityWalker {
 
     unsigned CurLabel = 0;
     for (auto Prop : TypeContext->getStoredProperties()) {
-      if (auto Original = Prop->getOriginalDelegatedProperty())
-        Prop = Original;
-
       if (!isMemberwiseInitialized(Prop))
         continue;