[runtime] Replace global object link with native context link in all contexts.

src/compiler/js-operator.h

Index: src/compiler/js-operator.h
diff --git a/src/compiler/js-operator.h b/src/compiler/js-operator.h
index 3c8b7bb22dbe2b2776cf531a28b0cc4cda1afcc4..ba7c744cf3b01827e885225c3519332f34d81ea9 100644
--- a/src/compiler/js-operator.h
+++ b/src/compiler/js-operator.h
@@ -513,8 +513,6 @@ class JSOperatorBuilder final : public ZoneObject {
   const Operator* LoadContext(size_t depth, size_t index, bool immutable);
   const Operator* StoreContext(size_t depth, size_t index);
 
-  const Operator* LoadNativeContext();
-
   const Operator* LoadDynamic(const Handle<String>& name,
                               TypeofMode typeof_mode);