fep-044f: Remove exception allowing mentioned users to quote without approval (#660)

This exception had two purposes:
1. Provide consistency with the exception in other policies defined by GoToSocial
2. Provide an “escape hatch” to mentioned users allowing them to react to mentions of them

However:
1. GoToSocial's interaction policies define this exception only for replies, and not for the other sub-policies, so not having this exception for quotes would not actually make it less consistent
2. While useful, this “escape hatch” is not necessary, as it is still possible to reply to such posts
3. this exception reduces the usefulness of the quote authorization feature a little, and adds both implementation and UX complexity

Therefore, we think this exception causes more issues than it solves, and we are considering removing it, even though it is a significant change to a FEP draft that has been largely unchanged for a while.

Co-authored-by: Claire <claire.github-309c@sitedethib.com>
Reviewed-on: https://codeberg.org/fediverse/fep/pulls/660
Co-authored-by: ClearlyClaire <clearlyclaire@noreply.codeberg.org>
Co-committed-by: ClearlyClaire <clearlyclaire@noreply.codeberg.org>

fep/044f/fep-044f.md

@@ -368,7 +368,6 @@ Depending on whether they already sent a `Create` activity to the quote post's i
 
 When processing a quote post from a remote actor, a recipient MUST consider them unapproved unless any of those conditions apply:
 - the author of the quote post and that of the original post are the same (same `attributedTo`)
-- the author of the quote post is mentioned in the original post
 - `quoteAuthorization` exists, can be dereferenced and is a valid `QuoteAuthorization` activity for this object
 
 ## Revocation of a quote post