APINotes: remove accidentally committed downstream changes

Remove the inferAsMember downstream changes which are not meant to be
part of the APINotes support.

Author: compnerd

clang/lib/APINotes/APINotesWriter.cpp

@@ -30,10 +30,6 @@ class APINotesWriter::Implementation {
   /// Scratch space for bitstream writing.
   llvm::SmallVector<uint64_t, 64> Scratch;
 
-#if defined(__APPLE__) && defined(SWIFT_DOWNSTREAM)
-  bool SwiftImportAsMember = false;
-#endif
-
   /// Mapping from strings to identifier IDs.
   llvm::StringMap<IdentifierID> IdentifierIDs;
 
@@ -227,13 +223,6 @@ void APINotesWriter::Implementation::writeControlBlock(
   control_block::ModuleNameLayout ModuleName(Stream);
   ModuleName.emit(Scratch, this->ModuleName);
 
-#if defined(__APPLE__) && defined(SWIFT_DOWNSTREAM)
-  if (SwiftInferImportAsMember) {
-    control_block::ModuleOptionsLayout ModuleOptions(Stream);
-    ModuleOptions.emit(Scratch, SwiftInferImportAsMember);
-  }
-#endif
-
   if (SourceFile) {
     control_block::SourceFileLayout SourceFile(Stream);
     SourceFile.emit(Scratch, this->SourceFile->getSize(),