How to remove / delete Subdomain in Plesk 12.5?
To delete subdomains in the plesk, follow the steps given below.
Step 1: Login to Plesk panel.
Step 2: In the homepage, under Websites & Domains, click Show More near the respective domain.
Step 3: Click Remove Subdomain present at the bottom right corner.
Step 4: Click Yes to delete the subdomain.
After deleting the subdomain, you will get an alert message as shown in the image below.