Remove obsoleted tournament migration flow

osu.Game.Tournament/Configuration/TournamentConfigManager.cs

@@ -0,0 +1,34 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+#nullable disable
+
+using osu.Framework.Configuration;
+using osu.Framework.Platform;
+
+namespace osu.Game.Tournament.Configuration
+{
+    public class TournamentConfigManager : IniConfigManager<StorageConfig>
+    {
+        protected override string Filename => "tournament.ini";
+
+        private const string default_tournament = "default";
+
+        public TournamentConfigManager(Storage storage)
+            : base(storage)
+        {
+        }
+
+        protected override void InitialiseDefaults()
+        {
+            base.InitialiseDefaults();
+
+            SetDefault(StorageConfig.CurrentTournament, default_tournament);
+        }
+    }
+
+    public enum StorageConfig
+    {
+        CurrentTournament,
+    }
+}