[cleanup] Remove now-unused fields of FunctionState

src/parsing/parser-base.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_PARSING_PARSER_BASE_H
 #define V8_PARSING_PARSER_BASE_H
 
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
@@ skipping 479 matching lines @@
     }
 
     // Used to assign an index to each literal that needs materialization in
     // the function.  Includes regexp literals, and boilerplate for object and
     // array literals.
     int next_materialized_literal_index_;
 
     // Properties count estimation.
     int expected_property_count_;
 
-    // For generators, this variable may hold the generator object. It variable
-    // is used by yield expressions and return statements. It is not necessary
-    // for generator functions to have this variable set.
-    Variable* generator_object_variable_;
-    // For async functions, this variable holds a temporary for the Promise
-    // being created as output of the async function.
-    Variable* promise_variable_;
-
     FunctionState** function_state_stack_;
     FunctionState* outer_function_state_;
 
     ZoneList<DestructuringAssignment> destructuring_assignments_to_rewrite_;
     TailCallExpressionList tail_call_expressions_;
     ReturnExprContext return_expr_context_;
     ZoneList<ExpressionT> non_patterns_to_rewrite_;
 
     ZoneList<typename ExpressionClassifier::Error> reported_errors_;
 
@@ skipping 989 matching lines @@
   friend class DiscardableZoneScope;
 };
 
 template <typename Impl>
 ParserBase<Impl>::FunctionState::FunctionState(
     FunctionState** function_state_stack, ScopeState** scope_stack,
     DeclarationScope* scope)
     : ScopeState(scope_stack, scope),
       next_materialized_literal_index_(0),
       expected_property_count_(0),
-      generator_object_variable_(nullptr),
-      promise_variable_(nullptr),
       function_state_stack_(function_state_stack),
       outer_function_state_(*function_state_stack),
       destructuring_assignments_to_rewrite_(16, scope->zone()),
       tail_call_expressions_(scope->zone()),
       return_expr_context_(ReturnExprContext::kInsideValidBlock),
       non_patterns_to_rewrite_(0, scope->zone()),
       reported_errors_(16, scope->zone()),
       next_function_is_likely_called_(false),
       previous_function_was_likely_called_(false) {
   *function_state_stack = this;
@@ skipping 4242 matching lines @@
 }
 
 #undef CHECK_OK
 #undef CHECK_OK_CUSTOM
 #undef CHECK_OK_VOID
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_BASE_H