remove unnecessary property for repository object

Jellyfin.Server/Migrations/Routines/AddDefaultPluginRepository.cs

@@ -15,7 +15,6 @@ namespace Jellyfin.Server.Migrations.Routines
         {
             Name = "Jellyfin Stable",
             Url = "https://repo.jellyfin.org/releases/plugin/manifest-stable.json",
-            Id = Guid.Parse("3721cd80-b10f-4b26-aecd-74c0f0defe97"),
             Enabled = true
         };
 

MediaBrowser.Model/Updates/RepositoryInfo.cs

@@ -19,12 +19,6 @@ namespace MediaBrowser.Model.Updates
         /// <value>The URL.</value>
         public string Url { get; set; }
 
-        /// <summary>
-        /// Gets or sets the ID.
-        /// </summary>
-        /// <value>The ID.</value>
-        public Guid Id { get; set; }
-
         /// <summary>
         /// Gets or sets the enabled status of the repository.
         /// </summary>