There are two ways to remove a user's profile:
First way (via Admin Area):
1. You should go to Admin Area > Users > Browse Users;
2. Find the user's profile you want to remove and check the box against this profile;
3. Scroll down > you will see the Delete button.
or
1. You should go to Admin Area > Users > Browse Users;
2. Find the user's profile you want to remove and click on it;
3. You will be directed to the profile page;
4. There you will see the Delete button.
Second way (by a user):
1. The user should login to the site;
2. Then go to his Dashboard page;
3. Click the Profile Edit tab;
4. Scroll down > they will see the Delete Profile button.