fix(server): remove connection stats feature (#1063)

lib/data/provider/server/all.dart

@@ -225,9 +225,6 @@ class ServersNotifier extends _$ServersNotifier {
     Stores.setting.serverOrder.put(newOrder);
     Stores.server.delete(id);
 
-    // Remove connection stats when server is deleted
-    Stores.connectionStats.clearServerStats(id);
-
     // Remove SSH session when server is deleted
     final sessionId = 'ssh_$id';
     TermSessionManager.remove(sessionId);
@@ -246,7 +243,6 @@ class ServersNotifier extends _$ServersNotifier {
 
     Stores.setting.serverOrder.put([]);
     Stores.server.clear();
-    Stores.connectionStats.clearAll();
     bakSync.sync(milliDelay: 1000);
   }