Twitter's plan to refocus on its core business consists of laying off 9 percent of its staff, and also killing off Vine. The company announced today that it will shut down Vine's video app in the coming months. From a Recode report: Vine has been struggling for some time, so Thursday's move is surprising but not unbelievable. The app was never a revenue driver for the company, and it was no longer growing. Many of its top executives left over the spring and early summer. What's interesting is that Twitter is shutting the app down instead of trying to sell it off. Or perhaps it did try and simply couldn't find a buyer (like a buyer for itself). Either way, Vine will soon shut down. The company says that users will be able to download their Vine videos before that happens, but there has been no specific timetable announced. Vine general manager Hannah Davis, who just joined the company this spring, will stay on to oversee the transition, according to a spokesperson.