Refact, remove avoidable clone (rustdesk#7040)

Signed-off-by: fufesou <[email protected]>

src/server/connection.rs

@@ -1221,7 +1221,7 @@ impl Connection {
                 Ok(displays) => {
                     // For compatibility with old versions, we need to send the displays to the peer.
                     // But the displays may be updated later, before creating the video capturer.
-                    pi.displays = displays.clone();
+                    pi.displays = displays;
                     pi.current_display = self.display_idx as _;
                     res.set_peer_info(pi);
                     sub_service = true;