[es2015] Remove the @@hasInstance protector cell.

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index e01456719d810a47815cde2fd2e4ec35f2c47b61..38a26be1e29a70450d6d08460fbe0e7473b25244 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -3073,15 +3073,6 @@ void Isolate::UpdateArrayProtectorOnSetElement(Handle<JSObject> object) {
       handle(Smi::FromInt(kProtectorInvalid), this));
 }
 
-void Isolate::InvalidateHasInstanceProtector() {
-  DCHECK(factory()->has_instance_protector()->value()->IsSmi());
-  DCHECK(IsHasInstanceLookupChainIntact());
-  PropertyCell::SetValueWithInvalidation(
-      factory()->has_instance_protector(),
-      handle(Smi::FromInt(kProtectorInvalid), this));
-  DCHECK(!IsHasInstanceLookupChainIntact());
-}
-
 void Isolate::InvalidateIsConcatSpreadableProtector() {
   DCHECK(factory()->is_concat_spreadable_protector()->value()->IsSmi());
   DCHECK(IsIsConcatSpreadableLookupChainIntact());