[Parser] Remove Variable::is_possibly_eval.

src/globals.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_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 798 matching lines @@
 // implemented according to ES6, section 7.1.1.
 enum class ToPrimitiveHint { kDefault, kNumber, kString };
 
 // Defines specifics about arguments object or rest parameter creation.
 enum class CreateArgumentsType : uint8_t {
   kMappedArguments,
   kUnmappedArguments,
   kRestParameter
 };
 
-enum class HandleDereferenceMode { kAllowed, kDisallowed };
-
 inline size_t hash_value(CreateArgumentsType type) {
   return bit_cast<uint8_t>(type);
 }
 
 inline std::ostream& operator<<(std::ostream& os, CreateArgumentsType type) {
   switch (type) {
     case CreateArgumentsType::kMappedArguments:
       return os << "MAPPED_ARGUMENTS";
     case CreateArgumentsType::kUnmappedArguments:
       return os << "UNMAPPED_ARGUMENTS";
@@ skipping 327 matching lines @@
  public:
   enum { kNone = 0x00, kSignedSmall = 0x01, kNumber = 0x3, kAny = 0x7 };
 };
 
 }  // namespace internal
 }  // namespace v8
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_