enable implicit_clone lint

src/database/key_value/globals.rs

@@ -191,7 +191,7 @@ lasttimelinecount_cache: {lasttimelinecount_cache}\n"
                 self.global.insert(b"keypair", &keypair)?;
                 Ok::<_, Error>(keypair)
             },
-            |s| Ok(s.to_vec()),
+            |s| Ok(s.clone()),
         )?;
 
         let mut parts = keypair_bytes.splitn(2, |&b| b == 0xff);

src/database/key_value/rooms/alias.rs

@@ -15,7 +15,7 @@ impl service::rooms::alias::Data for KeyValueDatabase {
 
     fn remove_alias(&self, alias: &RoomAliasId) -> Result<()> {
         if let Some(room_id) = self.alias_roomid.get(alias.alias().as_bytes())? {
-            let mut prefix = room_id.to_vec();
+            let mut prefix = room_id.clone();
             prefix.push(0xff);
 
             for (key, _) in self.aliasid_alias.scan_prefix(prefix) {

src/database/key_value/rooms/state.rs

@@ -63,7 +63,7 @@ impl service::rooms::state::Data for KeyValueDatabase {
         }
 
         for event_id in event_ids {
-            let mut key = prefix.to_owned();
+            let mut key = prefix.clone();
             key.extend_from_slice(event_id.as_bytes());
             self.roomid_pduleaves.insert(&key, event_id.as_bytes())?;
         }