store/postgres: Remove unecessary use statement
@@ -5,7 +5,6 @@ use diesel::prelude::*;
use diesel::sql_types::Text;
use diesel::{debug_query, delete, insert_into, result, select};
use filter::store_filter;
-use futures::stream;
use futures::sync::mpsc::{channel, Receiver, Sender};
use std::collections::HashMap;
use std::sync::{Arc, RwLock};
