1. Log into your cPanel account.
2. In the "Domains" section, click on the "Subdomains" icon.
3. Under "Modify a Subdomain" you will see a list of subdomains.
4. Click on the "Remove" button next to the desired subdomain.
5. You will receive a warning that you are removing a "subdomain.example.com". Click on the "Delete Subdomain" button to remove your subdomain permanently. 
