[core] move message auto-delete service from code-watcher to core

modules/CodeWatcher/CodeWatcher.cs

@@ -1,17 +1,9 @@
-using System.Collections.Concurrent;
-using Kruzya.TelegramBot.Core;
-using Microsoft.Extensions.DependencyInjection;
+using Kruzya.TelegramBot.Core;
 
 namespace West.TelegramBot.CodeWatcher
 {
     public class CodeWatcher : Module
     {
         public CodeWatcher(Core core) : base(core) {}
-
-        public override void ConfigureServices(IServiceCollection services)
-        {
-            services.AddSingleton<ConcurrentBag<DeleteRequest>>();
-            services.AddHostedService<DeleteService>();
-        }
     }
 }