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

src/ast/variables.cc

 // 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.
 
 #include "src/ast/variables.h"
 
 #include "src/ast/scopes.h"
 #include "src/globals.h"
 
 namespace v8 {
@@ skipping 22 matching lines @@
 
 
 bool Variable::IsGlobalObjectProperty() const {
   // Temporaries are never global, they must always be allocated in the
   // activation frame.
   return (IsDynamicVariableMode(mode()) ||
           (IsDeclaredVariableMode(mode()) && !IsLexicalVariableMode(mode()))) &&
          scope_ != NULL && scope_->is_script_scope();
 }
 
-
-bool Variable::IsStaticGlobalObjectProperty() const {
-  // Temporaries are never global, they must always be allocated in the
-  // activation frame.
-  return (IsDeclaredVariableMode(mode()) && !IsLexicalVariableMode(mode())) &&
-         scope_ != NULL && scope_->is_script_scope();
-}
-
-
 }  // namespace internal
 }  // namespace v8