Remove more dead code after Object.observe removal

src/builtins.h

 // Copyright 2011 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_BUILTINS_H_
 #define V8_BUILTINS_H_
 
 #include "src/base/flags.h"
 #include "src/handles.h"
 
@@ skipping 108 matching lines @@
   V(GlobalEval, kTarget)                                       \
                                                                \
   V(MathAcos, kNone)                                           \
   V(MathAsin, kNone)                                           \
   V(MathAtan, kNone)                                           \
   V(MathFround, kNone)                                         \
   V(MathImul, kNone)                                           \
                                                                \
   V(ObjectAssign, kNone)                                       \
   V(ObjectCreate, kNone)                                       \
+  V(ObjectDefineGetter, kNone)                                 \
   V(ObjectDefineProperties, kNone)                             \
   V(ObjectDefineProperty, kNone)                               \
+  V(ObjectDefineSetter, kNone)                                 \
+  V(ObjectEntries, kNone)                                      \
   V(ObjectFreeze, kNone)                                       \
   V(ObjectGetOwnPropertyDescriptor, kNone)                     \
+  V(ObjectGetOwnPropertyDescriptors, kNone)                    \
   V(ObjectGetOwnPropertyNames, kNone)                          \
   V(ObjectGetOwnPropertySymbols, kNone)                        \
   V(ObjectGetPrototypeOf, kNone)                               \
   V(ObjectIs, kNone)                                           \
   V(ObjectIsExtensible, kNone)                                 \
   V(ObjectIsFrozen, kNone)                                     \
   V(ObjectIsSealed, kNone)                                     \
   V(ObjectKeys, kNone)                                         \
+  V(ObjectLookupGetter, kNone)                                 \
+  V(ObjectLookupSetter, kNone)                                 \
+  V(ObjectPreventExtensions, kNone)                            \
+  V(ObjectProtoToString, kNone)                                \
+  V(ObjectSeal, kNone)                                         \
   V(ObjectValues, kNone)                                       \
-  V(ObjectEntries, kNone)                                      \
-  V(ObjectGetOwnPropertyDescriptors, kNone)                    \
-  V(ObjectPreventExtensions, kNone)                            \
-  V(ObjectSeal, kNone)                                         \
-  V(ObjectProtoToString, kNone)                                \
                                                                \
   V(ProxyConstructor, kNone)                                   \
   V(ProxyConstructor_ConstructStub, kTarget)                   \
                                                                \
   V(ReflectDefineProperty, kNone)                              \
   V(ReflectDeleteProperty, kNone)                              \
   V(ReflectGet, kNone)                                         \
   V(ReflectGetOwnPropertyDescriptor, kNone)                    \
   V(ReflectGetPrototypeOf, kNone)                              \
   V(ReflectHas, kNone)                                         \
@@ skipping 525 matching lines @@
   friend class BuiltinFunctionTable;
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_H_