If you want to remove a candidate's record altogether from Recruiting, follow these steps: 

1. Log in and go to People > Hiring > Applicant Tracking. The screen opens with a list of active jobs in your company.

2. Click the job with the candidate, and on the Candidate Breakdown screen, click the candidate you want to delete. That candidate's Details screen appears.  

3. At the left of the candidate's name, click the blue info icon, and a popup appears with other options. 

4. Click Delete Candidate, and when the Delete Candidate popup appears, click DELETE. The popup disappears, and a notification appears verifying you removed a candidate.

For more information, see How Do I Remove a Closed or Filled Position from Recruiting?