Revert of Implement SharedArrayBuffer

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index f41f6466909ce3d6400858f9747c9f8abd819827..4b7341ece9f02d2e7f1aa0886c2a67cfc47f1f1c 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -10260,10 +10260,6 @@
 };
 
 
-// Whether a JSArrayBuffer is a SharedArrayBuffer or not.
-enum class SharedFlag { kNotShared, kShared };
-
-
 class JSArrayBuffer: public JSObject {
  public:
   // [backing_store]: backing memory for this array
@@ -10283,9 +10279,6 @@
 
   inline bool was_neutered();
   inline void set_was_neutered(bool value);
-
-  inline bool is_shared();
-  inline void set_is_shared(bool value);
 
   DECLARE_CAST(JSArrayBuffer)
 
@@ -10311,7 +10304,6 @@
   class IsExternal : public BitField<bool, 1, 1> {};
   class IsNeuterable : public BitField<bool, 2, 1> {};
   class WasNeutered : public BitField<bool, 3, 1> {};
-  class IsShared : public BitField<bool, 4, 1> {};
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSArrayBuffer);