There are a couple of options to remove your profile from that device.
1
Open the Settings App.
Go to Accounts - Other Users.
Click the 'Add Account button.
Create a new account and do not add any Microsoft account details, so a Local account is created.
Then log out of your account and log into the new account you have created.
IN the new account, click your Start Button, then just type netplwiz and press Enter.
On the resulting utility, select your own account and you can delete it from there, and when asked, select the option to delete your files.
2
Or you can reset Windows on that device.
Click the power button on your Start menu.
Press the Shift Key and click Restart
Your PC will boot into the Windows Recovery Environment
Go to Troubleshoot - Advanced Options - Reset this PC
Choose to keep nothing
Then start the Reset