Send the paste URL to abuse@pasteguru.com and say what is wrong with it.
Pastes containing stolen credentials, personal data, copyrighted material posted without permission, malware, or unlawful content are removed. Reports from the person whose data it is, or from the rights holder, are dealt with first; everything else is handled in order, usually within a couple of days.
Please include the URL rather than a screenshot: the id is the only way to find a paste.