remove email field from dump

- `do_nothing` on `emails` insertion violates unique
contraint on user_id

Author: mugoh

src/models/user.rs

@@ -90,7 +90,7 @@ impl<'a> NewUser<'a> {
 
                 let token = insert_into(emails::table)
                     .values(&new_email)
-                    .on_conflict_do_nothing()
+                    .do_update()
                     .returning(emails::token)
                     .get_result::<String>(conn)
                     .optional()?;

src/tasks/dump_db/dump-db.toml

@@ -165,7 +165,6 @@ id in (
 )"""
 [users.columns]
 id = "public"
-email = "private"
 gh_access_token = "private"
 gh_login = "public"
 name = "public"