Remove unused namespaces in HomeController

Cleaned up HomeController in ChessServer by removing unused namespaces. This improves the readability and maintainability of the code, making it less cluttered and easier to understand.

src/Aiursoft.ChessServer/Controllers/HomeController.cs

@@ -1,10 +1,5 @@
-using Aiursoft.AiurObserver.Extensions;
-using Aiursoft.AiurObserver.WebSocket.Server;
 using Aiursoft.ChessServer.Data;
-using Aiursoft.ChessServer.Models;
 using Aiursoft.ChessServer.Models.ViewModels;
-using Aiursoft.CSTools.Services;
-using Aiursoft.WebTools.Attributes;
 using Microsoft.AspNetCore.Mvc;
 
 namespace Aiursoft.ChessServer.Controllers;