[es2015] Remove the @@hasInstance protector cell.

src/heap/heap.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_HEAP_H_
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
 #include <map>
 
@@ skipping 146 matching lines @@
   V(Script, empty_script, EmptyScript)                                         \
   V(Cell, undefined_cell, UndefinedCell)                                       \
   V(FixedArray, empty_sloppy_arguments_elements, EmptySloppyArgumentsElements) \
   V(SeededNumberDictionary, empty_slow_element_dictionary,                     \
     EmptySlowElementDictionary)                                                \
   V(PropertyCell, empty_property_cell, EmptyPropertyCell)                      \
   V(WeakCell, empty_weak_cell, EmptyWeakCell)                                  \
   /* Protectors */                                                             \
   V(PropertyCell, array_protector, ArrayProtector)                             \
   V(Cell, is_concat_spreadable_protector, IsConcatSpreadableProtector)         \
-  V(PropertyCell, has_instance_protector, HasInstanceProtector)                \
   V(Cell, species_protector, SpeciesProtector)                                 \
   V(PropertyCell, string_length_protector, StringLengthProtector)              \
   V(Cell, fast_array_iteration_protector, FastArrayIterationProtector)         \
   V(PropertyCell, array_iterator_protector, ArrayIteratorProtector)            \
   V(PropertyCell, array_buffer_neutering_protector,                            \
     ArrayBufferNeuteringProtector)                                             \
   /* Special numbers */                                                        \
   V(HeapNumber, nan_value, NanValue)                                           \
   V(HeapNumber, hole_nan_value, HoleNanValue)                                  \
   V(HeapNumber, infinity_value, InfinityValue)                                 \
@@ skipping 2503 matching lines @@
   friend class LargeObjectSpace;
   friend class NewSpace;
   friend class PagedSpace;
   DISALLOW_COPY_AND_ASSIGN(AllocationObserver);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_HEAP_H_