Remove some now unnecessary calls to setAddedImplicitInitializers

Now that implicit struct initializers are done
though requests, there's no need to set the
AddedImplicitInitializers bit for them.

Author: hamishknight

lib/ClangImporter/ImportDecl.cpp

@@ -2726,7 +2726,6 @@ namespace {
         auto Loc = Impl.importSourceLoc(decl->getLocation());
         auto structDecl = Impl.createDeclWithClangNode<StructDecl>(decl,
           AccessLevel::Public, Loc, name, Loc, None, nullptr, dc);
-        structDecl->setAddedImplicitInitializers();
 
         auto options = getDefaultMakeStructRawValuedOptions();
         options |= MakeStructRawValuedFlags::MakeUnlabeledValueInit;
@@ -2775,7 +2774,6 @@ namespace {
                C.getProtocol(KnownProtocolKind::ErrorCodeProtocol))) {
           // Create the wrapper struct.
           errorWrapper = new (C) StructDecl(loc, name, loc, None, nullptr, dc);
-          errorWrapper->setAddedImplicitInitializers();
           errorWrapper->setAccess(AccessLevel::Public);
           errorWrapper->getAttrs().add(
             new (Impl.SwiftContext) FrozenAttr(/*IsImplicit*/true));
@@ -3203,7 +3201,6 @@ namespace {
                                  name,
                                  Impl.importSourceLoc(decl->getLocation()),
                                  None, nullptr, dc);
-      result->setAddedImplicitInitializers();
       Impl.ImportedDecls[{decl->getCanonicalDecl(), getVersion()}] = result;
 
       // FIXME: Figure out what to do with superclasses in C++. One possible
@@ -5484,7 +5481,6 @@ SwiftDeclConverter::importSwiftNewtype(const clang::TypedefNameDecl *decl,
 
   auto structDecl = Impl.createDeclWithClangNode<StructDecl>(
       decl, AccessLevel::Public, Loc, name, Loc, None, nullptr, dc);
-  structDecl->setAddedImplicitInitializers();
 
   // Import the type of the underlying storage
   auto storedUnderlyingType = Impl.importTypeIgnoreIUO(
@@ -5760,7 +5756,6 @@ SwiftDeclConverter::importAsOptionSetType(DeclContext *dc, Identifier name,
   // Create a struct with the underlying type as a field.
   auto structDecl = Impl.createDeclWithClangNode<StructDecl>(
       decl, AccessLevel::Public, Loc, name, Loc, None, nullptr, dc);
-  structDecl->setAddedImplicitInitializers();
 
   makeStructRawValued(Impl, structDecl, underlyingType,
                       {KnownProtocolKind::OptionSet});