How to remove Windows after installing Ubuntu?
just install OS-Uninstaller
to install it follow this:
open a new Terminal and write this commands:
sudo add-apt-repository ppa:yannubuntu/boot-repairpress enter then type:
sudo apt-get update; sudo apt-get install -y os-uninstaller && os-uninstallerlaunch OS-Uninstaller (System -> Administration -> OS-Uninstaller menu if you use Gnome, or via the dash if you use Unity), then choose the OS you want to remove and click "OK"
more info: https://help.ubuntu.com/community/OS-Uninstaller