For a simple solution, I usually clean that folder (containing che iOS simulators definition images from which i guess Xcode creates new virtual devices) I simply open Xcode, go to settings > components and then remove the old simulator images I don't want anymore.
I find them at the bottom of the list.
为了一个简单的解决方案，我通常清理那个文件夹（包含 iOS 模拟器定义的图片，我猜 Xcode 就是从这些图片创建新的虚拟设备的）。我只需打开 Xcode，进入设置 > 组件，然后移除我不再需要的旧模拟器图片。
它们位于列表的底部。
