Revert "Log expired publishing intents to Sentry"
Revert "Log expired publishing intents to Sentry"

This reverts commit 9a66336d2d36531a81f74c41d6ad086b51978b85.

As of the previous commit, publishing intents are no longer deleted when
the content is published. So we now rely on the housekeeping job to
delete old publishing intents, and we should no longer log a warning
when it does so.

alphagov/content-store,alphagov/content-store