There is no way to delete student's SCORM attempts

The quiz module offers this functionality, and sometime it is necessary, for example to allow one particular student a second attempt at a scorm limited to one attempt.

In the quiz it is implemented as a column of checkboxes in the report that lists students' attempts, with a 'Delete selected attempts' button below.

(Also, it is very useful if you are trying to run the SCORM compliance test suite and something goes wrong half way through, and you need to reset and start again.)