[promises] Clean up promise utils and remove dead code

src/factory.h

 // Copyright 2014 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_FACTORY_H_
 #define V8_FACTORY_H_
 
 #include "src/globals.h"
 #include "src/isolate.h"
 #include "src/messages.h"
@@ skipping 51 matching lines @@
 
   Handle<FrameArray> NewFrameArray(int number_of_frames,
                                    PretenureFlag pretenure = NOT_TENURED);
 
   Handle<OrderedHashSet> NewOrderedHashSet();
   Handle<OrderedHashMap> NewOrderedHashMap();
 
   // Create a new boxed value.
   Handle<Box> NewBox(Handle<Object> value);
 
-  // Create a new PromiseReactionJobInfo struct.
-  Handle<PromiseReactionJobInfo> NewPromiseReactionJobInfo(
-      Handle<Object> value, Handle<Object> tasks,
-      Handle<Object> deferred_promise, Handle<Object> deferred_on_resolve,
-      Handle<Object> deferred_on_reject, Handle<Context> context);
-
   // Create a new PrototypeInfo struct.
   Handle<PrototypeInfo> NewPrototypeInfo();
 
   // Create a new Tuple2 struct.
   Handle<Tuple2> NewTuple2(Handle<Object> value1, Handle<Object> value2);
 
   // Create a new Tuple3 struct.
   Handle<Tuple3> NewTuple3(Handle<Object> value1, Handle<Object> value2,
                            Handle<Object> value3);
 
@@ skipping 225 matching lines @@
   Handle<Context> NewDebugEvaluateContext(Handle<Context> previous,
                                           Handle<ScopeInfo> scope_info,
                                           Handle<JSReceiver> extension,
                                           Handle<Context> wrapped,
                                           Handle<StringSet> whitelist);
 
   // Create a block context.
   Handle<Context> NewBlockContext(Handle<JSFunction> function,
                                   Handle<Context> previous,
                                   Handle<ScopeInfo> scope_info);
-  // Create a promise context.
-  Handle<Context> NewPromiseResolvingFunctionContext(int length);
 
   // Allocate a new struct.  The struct is pretenured (allocated directly in
   // the old generation).
   Handle<Struct> NewStruct(InstanceType type);
 
   Handle<AliasedArgumentsEntry> NewAliasedArgumentsEntry(
       int aliased_context_slot);
 
   Handle<AccessorInfo> NewAccessorInfo();
 
@@ skipping 482 matching lines @@
   void SetStrictFunctionInstanceDescriptor(Handle<Map> map,
                                            FunctionMode function_mode);
 
   void SetClassFunctionInstanceDescriptor(Handle<Map> map);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FACTORY_H_