Split ModSettingChangeTracker into separate file

osu.Game/Configuration/ModSettingChangeTracker.cs

@@ -0,0 +1,39 @@
+// 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.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using osu.Game.Overlays.Settings;
+using osu.Game.Rulesets.Mods;
+
+namespace osu.Game.Configuration
+{
+    public class ModSettingChangeTracker : IDisposable
+    {
+        public Action<Mod> SettingChanged;
+
+        private readonly List<ISettingsItem> references = new List<ISettingsItem>();
+
+        public ModSettingChangeTracker(IEnumerable<Mod> mods)
+        {
+            foreach (var mod in mods)
+            {
+                foreach (var setting in mod.CreateSettingsControls().OfType<ISettingsItem>())
+                {
+                    setting.SettingChanged += () => SettingChanged?.Invoke(mod);
+                    references.Add(setting);
+                }
+            }
+        }
+
+        public void Dispose()
+        {
+            SettingChanged = null;
+
+            foreach (var r in references)
+                r.Dispose();
+            references.Clear();
+        }
+    }
+}

osu.Game/Configuration/SettingSourceAttribute.cs

@@ -9,7 +9,6 @@ using JetBrains.Annotations;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Game.Overlays.Settings;
-using osu.Game.Rulesets.Mods;
 
 namespace osu.Game.Configuration
 {
@@ -141,32 +140,4 @@ namespace osu.Game.Configuration
             return orderedRelative.Concat(unordered);
         }
     }
-
-    public class ModSettingChangeTracker : IDisposable
-    {
-        public Action<Mod> SettingChanged;
-
-        private readonly List<ISettingsItem> references = new List<ISettingsItem>();
-
-        public ModSettingChangeTracker(IEnumerable<Mod> mods)
-        {
-            foreach (var mod in mods)
-            {
-                foreach (var setting in mod.CreateSettingsControls().OfType<ISettingsItem>())
-                {
-                    setting.SettingChanged += () => SettingChanged?.Invoke(mod);
-                    references.Add(setting);
-                }
-            }
-        }
-
-        public void Dispose()
-        {
-            SettingChanged = null;
-
-            foreach (var r in references)
-                r.Dispose();
-            references.Clear();
-        }
-    }
 }