window10 双系统，win10+ubuntu16.04双系统下完全删除ubunt

参考文章： 1. 彻底删除Ubuntu EFI分区及启动项： https://blog.csdn.net/mtllyb/article/details/78635757 2. Create a bootable USB stick on Windows: https://tutorials.ubuntu.com/tutorial/tutorial-create-a-usb-stick-on-win

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