Move snap provider caching to interfaces

osu.Game/Rulesets/Edit/DistancedHitObjectComposer.cs

@@ -23,7 +23,6 @@ namespace osu.Game.Rulesets.Edit
     /// Represents a <see cref="HitObjectComposer{TObject}"/> for rulesets with the concept of distances between objects.
     /// </summary>
     /// <typeparam name="TObject">The base type of supported objects.</typeparam>
-    [Cached(typeof(IDistanceSnapProvider))]
     public abstract class DistancedHitObjectComposer<TObject> : HitObjectComposer<TObject>, IDistanceSnapProvider, IScrollBindingHandler<GlobalAction>
         where TObject : HitObject
     {

osu.Game/Rulesets/Edit/HitObjectComposer.cs

@@ -388,7 +388,6 @@ namespace osu.Game.Rulesets.Edit
     /// Generally used to access certain methods without requiring a generic type for <see cref="HitObjectComposer{T}" />.
     /// </summary>
     [Cached(typeof(HitObjectComposer))]
-    [Cached(typeof(IPositionSnapProvider))]
     public abstract class HitObjectComposer : CompositeDrawable, IPositionSnapProvider
     {
         protected HitObjectComposer()

osu.Game/Rulesets/Edit/IDistanceSnapProvider.cs

@@ -1,12 +1,14 @@
 // 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 osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Objects;
 
 namespace osu.Game.Rulesets.Edit
 {
+    [Cached]
     public interface IDistanceSnapProvider : IPositionSnapProvider
     {
         /// <summary>

osu.Game/Rulesets/Edit/IPositionSnapProvider.cs

@@ -1,10 +1,12 @@
 // 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 osu.Framework.Allocation;
 using osuTK;
 
 namespace osu.Game.Rulesets.Edit
 {
+    [Cached]
     public interface IPositionSnapProvider
     {
         /// <summary>

osu.Game/Screens/Edit/Compose/Components/Timeline/Timeline.cs

@@ -19,7 +19,6 @@ using osuTK;
 
 namespace osu.Game.Screens.Edit.Compose.Components.Timeline
 {
-    [Cached(typeof(IPositionSnapProvider))]
     [Cached]
     public class Timeline : ZoomableScrollContainer, IPositionSnapProvider
     {