src: remove unused fields isolate_ · nodejs/node@65924c7

nodejs

Original file line number	Diff line number	Diff line change
`@@ -65,7 +65,7 @@ size_t BackgroundTaskRunner::NumberOfAvailableBackgroundThreads() const {`
`65`	`65`
`66`	`66`	`PerIsolatePlatformData::PerIsolatePlatformData(`
`67`	`67`	`v8::Isolate* isolate, uv_loop_t* loop)`
`68`		`- : isolate_(isolate), loop_(loop) {`
	`68`	`+ : loop_(loop) {`
`69`	`69`	`flush_tasks_ = new uv_async_t();`
`70`	`70`	`CHECK_EQ(0, uv_async_init(loop, flush_tasks_, FlushTasks));`
`71`	`71`	`flush_tasks_->data = static_cast<void*>(this);`