[runtime] Remove unused %ToBool runtime function.

src/runtime/runtime-object.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/debug/debug.h"
 #include "src/messages.h"
@@ skipping 1030 matching lines @@
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
   if (object->IsJSObject() && !object->IsGlobalObject()) {
     JSObject::MigrateSlowToFast(Handle<JSObject>::cast(object), 0,
                                 "RuntimeToFastProperties");
   }
   return *object;
 }
 
 
-RUNTIME_FUNCTION(Runtime_ToBool) {
-  SealHandleScope shs(isolate);
-  DCHECK(args.length() == 1);
-  CONVERT_ARG_CHECKED(Object, object, 0);
-
-  return isolate->heap()->ToBoolean(object->BooleanValue());
-}
-
-
 RUNTIME_FUNCTION(Runtime_NewStringWrapper) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(String, value, 0);
   return *Object::ToObject(isolate, value).ToHandleChecked();
 }
 
 
 RUNTIME_FUNCTION(Runtime_AllocateHeapNumber) {
   HandleScope scope(isolate);
@@ skipping 400 matching lines @@
   Handle<JSReceiver> receiver;
   if (JSReceiver::ToObject(isolate, object).ToHandle(&receiver)) {
     return *receiver;
   }
   THROW_NEW_ERROR_RETURN_FAILURE(
       isolate, NewTypeError(MessageTemplate::kUndefinedOrNullToObject));
 }
 
 }  // namespace internal
 }  // namespace v8