Revert "Delete audit data > 30 days old"

This reverts commit cd8a835.

We aren't going to truncate audit records any longer, and will just
monitor table usage to see if we should truncate in the future.

See clojars/clojars-web#812

aws-ansible/roles/clojars/tasks/cron.yml

@@ -57,12 +57,3 @@
     hour: "1"
     job: "find /tmp -name 'upload-*' -type d -mtime +3 -exec rm -rf {} +"
 
-- name: Set clearing of audit log
-  become: true
-  cron:
-    name: "Clear audit log info > 30 days old"
-    user: "clojars"
-    minute: "0"
-    hour: "0"
-    job: ". ~/bin/config_env; env PGPASSWORD=$POSTGRES_PASSWORD psql -h $POSTGRES_HOST -p 5432 -U clojars -c \"delete from audit where created < (now() - interval '30 days');\""
-