#368 Post-Python 3: Award deletion of a deleted award errors out

[Ahasuerus]

Award deletion of a deleted award errors out. If there are two or more pending Delete Award submissions in the queue and one of them is approved, the other one will error out with a Python error when mod/wa_delete.cgi, "query = "delete from title_awards where award_id=%d" % current.award_id", is run.

Normally, this scenario shouldn't happen because the submission review code will display the second submission as no longer approvable. However, there is a small chance that it will occur if the two submission review Web pages are displayed for the two Delete Award submissions at the same time.