expunge

Definition from Nolo’s Plain-English Law Dictionary

To intentionally destroy, obliterate, or strike out records or information in files, computers, and other depositories. For example, state law may allow the criminal records of a juvenile offender to be expunged when he reaches the age of majority, to allow him to begin his adult life with a clean record. Or, a company or government agency may routinely expunge out-of-date records to save storage space.

Definition provided by Nolo’s Plain-English Law Dictionary.