[cleanup] Remove dead code from Variable and simplify PatternRewriter slightly

src/ast/variables.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_AST_VARIABLES_H_
 #define V8_AST_VARIABLES_H_
 
 #include "src/ast/ast-value-factory.h"
 #include "src/globals.h"
 #include "src/zone/zone.h"
@@ skipping 46 matching lines @@
 
   bool IsUnallocated() const {
     return location() == VariableLocation::UNALLOCATED;
   }
   bool IsParameter() const { return location() == VariableLocation::PARAMETER; }
   bool IsStackLocal() const { return location() == VariableLocation::LOCAL; }
   bool IsStackAllocated() const { return IsParameter() || IsStackLocal(); }
   bool IsContextSlot() const { return location() == VariableLocation::CONTEXT; }
   bool IsLookupSlot() const { return location() == VariableLocation::LOOKUP; }
   bool IsGlobalObjectProperty() const;
-  bool IsStaticGlobalObjectProperty() const;
 
   bool is_dynamic() const { return IsDynamicVariableMode(mode()); }
   bool binding_needs_init() const {
     DCHECK(initialization_flag() != kNeedsInitialization ||
            IsLexicalVariableMode(mode()));
     return initialization_flag() == kNeedsInitialization;
   }
   bool throw_on_const_assignment(LanguageMode language_mode) const {
     return kind() != SLOPPY_FUNCTION_NAME_VARIABLE || is_strict(language_mode);
   }
@@ skipping 66 matching lines @@
   class InitializationFlagField
       : public BitField16<InitializationFlag, IsUsedField::kNext, 2> {};
   class MaybeAssignedFlagField
       : public BitField16<MaybeAssignedFlag, InitializationFlagField::kNext,
                           2> {};
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_VARIABLES_H_