why do we delete our old cluster advisories? Wouldn't it be helpful to have that history somewhere?

[stewartshea]

Reposting from the pull request comment:

@mitovskaol why do we delete our old cluster advisories? Wouldn't it be helpful to have that history somewhere?
/cc @Maralsotoudehnia

[stewartshea]

@wenzowski We purge the old notices to keep the folder clean and to reduce the notices that are posted to the online app. There are other ways to clean this up, but we felt no need to keep them live in the folder since we have a full commit history.