Remove redundant Scope book-keeping

src/ast/scopes.h

Index: src/ast/scopes.h
diff --git a/src/ast/scopes.h b/src/ast/scopes.h
index 0299210d8f773e365feb204361b09974c0a545d7..4b4b9d06f2a107402a73f7e231cfc27829349376 100644
--- a/src/ast/scopes.h
+++ b/src/ast/scopes.h
@@ -253,9 +253,6 @@ class Scope: public ZoneObject {
   // Inform the scope that the corresponding code contains an eval call.
   void RecordEvalCall() { scope_calls_eval_ = true; }
 
-  // Inform the scope that the corresponding code uses "arguments".
-  void RecordArgumentsUsage() { scope_uses_arguments_ = true; }
-
   // Inform the scope that the corresponding code uses "super".
   void RecordSuperPropertyUsage() { scope_uses_super_property_ = true; }
 
@@ -359,8 +356,6 @@ class Scope: public ZoneObject {
   // Is this scope inside a with statement.
   bool inside_with() const { return scope_inside_with_; }
 
-  // Does this scope access "arguments".
-  bool uses_arguments() const { return scope_uses_arguments_; }
   // Does this scope access "super" property (super.foo).
   bool uses_super_property() const { return scope_uses_super_property_; }
   // Does this scope have the potential to execute declarations non-linearly?
@@ -664,8 +659,6 @@ class Scope: public ZoneObject {
   // This scope or a nested catch scope or with scope contain an 'eval' call. At
   // the 'eval' call site this scope is the declaration scope.
   bool scope_calls_eval_;
-  // This scope uses "arguments".
-  bool scope_uses_arguments_;
   // This scope uses "super" property ('super.foo').
   bool scope_uses_super_property_;
   // This scope has a parameter called "arguments".