Hi,
Below are commands that can be used to delete a domain from Plesk (Windows) using CLI.
1. Using the command mentioned below find the domain ID of the domain you want to delete
%plesk_bin%\dbclient.exe" --direct-sql --sql="select * from domains"
2. Now use the command below to delete the domain
"%plesk_bin%\dbclient.exe" --direct-sql --sql="DELETE FROM domains where id=xxx"
Cheers !!!!!!