The archive is not a library. It is a ledger of what the system refused to forget on your behalf, including things especially the things you would have preferred it quietly lose.
Every entry keeps its revision history. Every deletion is a redaction, never an erasure. You can see where a thing used to be — only the words are gone.
There is no delete key. There is an acknowledge key, a supersede key, and, if you insist, a burn key — which takes 72 hours and asks you three questions.