Fix unused lifetims.

Fix unused pub(crate).

Allow implicit hasher.

Fix unused self.

Signed-off-by: Jason Volk <jason@zemos.net>

src/service/rooms/state_cache/update.rs

@@ -320,7 +320,7 @@ pub(crate) fn mark_as_left(&self, user_id: &UserId, room_id: &RoomId) {
 /// `update_membership` instead
 #[implement(super::Service)]
 #[tracing::instrument(skip(self), level = "debug")]
-pub(crate) fn mark_as_knocked(
+pub(crate) fn _mark_as_knocked(
 	&self,
 	user_id: &UserId,
 	room_id: &RoomId,