[cleanup] Remove {operator->} on Object and subtypes

For consistency, {Object} members should only be accessed via ".".
CL https://crrev.com/c/1624209 cleaned up the code base already. This
CL removes the now dead operator.

R=jkummerow@chromium.org

Bug: v8:9183, v8:3770
Change-Id: I599dcd49d79bfc68f970fe872b64b3b2680cddd5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1624788
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61768}

src/arm64/simulator-arm64.cc

@@ -3238,7 +3238,7 @@ void Simulator::Debug() {
             Object obj(value);
             os << arg1 << ": \n";
 #ifdef DEBUG
-            obj->Print(os);
+            obj.Print(os);
             os << "\n";
 #else
             os << Brief(obj) << "\n";

src/objects.h

@@ -273,10 +273,6 @@ class Object : public TaggedImpl<HeapObjectReferenceType::STRONG, Address> {
   constexpr Object() : TaggedImpl(kNullAddress) {}
   explicit constexpr Object(Address ptr) : TaggedImpl(ptr) {}
 
-  // These operator->() overloads are required for handlified code.
-  Object* operator->() { return this; }
-  const Object* operator->() const { return this; }
-
 #define IS_TYPE_FUNCTION_DECL(Type) V8_INLINE bool Is##Type() const;
   OBJECT_TYPE_LIST(IS_TYPE_FUNCTION_DECL)
   HEAP_OBJECT_TYPE_LIST(IS_TYPE_FUNCTION_DECL)

src/objects/object-macros.h

@@ -21,8 +21,6 @@
 #define OBJECT_CONSTRUCTORS(Type, ...)            \
  public:                                          \
   constexpr Type() : __VA_ARGS__() {}             \
-  Type* operator->() { return this; }             \
-  const Type* operator->() const { return this; } \
                                                   \
  protected:                                       \
   explicit inline Type(Address ptr)