I am confused, I thought you only sent the records you wanted to colleges. For my daughters ACT we only sent the colleges the grades we wanted them to see not the whole record.

This is illuminating, it is a list of what institutes require what scores to be sent.

http://professionals.collegeboard.com/profdownload/sat-score-use-practices-list.pdf

Given that some schools do require all scores sent, I might delete his test scores. Although I'm not sure this would look bad to have this score as a 7th grader. Depends on if you are going to want this score to get him admitted into something different next year.