/**
* Removes all associations with a track, this entails removing
* user track, cluster track and class track associations
* @param none
* @return none
*/
function delete()
{
// Cascade
$level = context_level_base::get_custom_context_level('track', 'block_curr_admin');
$result = usertrack::delete_for_track($this->id);
$result = $result && clustertrack::delete_for_track($this->id);
$result = $result && trackassignmentclass::delete_for_track($this->id);
$result = $result && delete_context($level, $this->id);
return $result && $this->data_delete_record();
}