Fix all default clippy warnings (#480)

All trivial, fixes were for:
 - #[deny(clippy::if_same_then_else)]
 - #[warn(clippy::explicit_auto_deref)]
 - #[warn(clippy::bool_assert_comparison)]

Co-authored-by: Geometrically <18202329+Geometrically@users.noreply.github.com>

src/routes/notifications.rs

@@ -124,7 +124,7 @@ pub async fn notifications_delete(
     let user = get_user_from_headers(req.headers(), &**pool).await?;
 
     let notification_ids =
-        serde_json::from_str::<Vec<NotificationId>>(&*ids.ids)?
+        serde_json::from_str::<Vec<NotificationId>>(&ids.ids)?
             .into_iter()
             .map(|x| x.into())
             .collect();