On what console do you want to delete a computer? If it is in the application you could use my short guide down below!
I hope this helps,
Thank you for using teamviewer!
The easiest way to delete a computer from your list is to log into your TeamViewer web portal and go to your computers. Then, click on the computer you want to delete and select 'Properties'. The next screen will, in the lower left quadrant of the screen give you the option to delete the computer.