CI fixes.

osu.Desktop.Tests/Visual/TestCaseScrollingPlayfield.cs

@@ -2,21 +2,17 @@ using System;
 using System.Collections.Generic;
 using OpenTK;
 using osu.Desktop.Tests.Beatmaps;
-using osu.Framework.Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Testing;
 using osu.Framework.Timing;
 using osu.Game.Beatmaps;
-using osu.Game.Rulesets;
 using osu.Game.Rulesets.Beatmaps;
 using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
-using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Scoring;
-using osu.Game.Rulesets.Timing;
 using osu.Game.Rulesets.UI;
 
 namespace osu.Desktop.Tests.Visual

osu.Game.Rulesets.Mania/Objects/Drawables/DrawableManiaHitObject.cs

@@ -4,7 +4,6 @@
 using OpenTK.Graphics;
 using OpenTK.Input;
 using osu.Framework.Configuration;
-using osu.Framework.Graphics;
 using osu.Game.Rulesets.Mania.Judgements;
 using osu.Game.Rulesets.Objects.Drawables;
 

osu.Game.Rulesets.Mania/Timing/GravityScrollingContainer.cs

@@ -1,7 +1,6 @@
 // Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-using osu.Framework.Graphics;
 using osu.Game.Rulesets.Timing;
 
 namespace osu.Game.Rulesets.Mania.Timing

osu.Game.Rulesets.Mania/UI/Column.cs

@@ -14,12 +14,9 @@ using osu.Game.Graphics;
 using osu.Game.Rulesets.Objects.Drawables;
 using System;
 using osu.Framework.Configuration;
-using osu.Game.Rulesets.Timing;
 using osu.Game.Rulesets.UI;
-using osu.Game.Rulesets.Mania.Objects.Drawables;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Mania.Judgements;
-using osu.Framework.Allocation;
 
 namespace osu.Game.Rulesets.Mania.UI
 {
@@ -195,7 +192,7 @@ namespace osu.Game.Rulesets.Mania.UI
         /// <summary>
         /// Adds a DrawableHitObject to this Playfield.
         /// </summary>
-        /// <param name="h">The DrawableHitObject to add.</param>
+        /// <param name="hitObject">The DrawableHitObject to add.</param>
         public override void Add(DrawableHitObject<ManiaHitObject, ManiaJudgement> hitObject)
         {
             hitObject.AccentColour = AccentColour;

osu.Game.Rulesets.Mania/UI/ManiaHitRenderer.cs

@@ -17,7 +17,6 @@ using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Rulesets.Beatmaps;
 using osu.Game.Rulesets.Mania.Beatmaps;
 using osu.Game.Rulesets.Mania.Judgements;
-using osu.Game.Rulesets.Mania.Mods;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Mania.Objects.Drawables;
 using osu.Game.Rulesets.Mania.Scoring;
@@ -97,9 +96,7 @@ namespace osu.Game.Rulesets.Mania.UI
 
         protected override DrawableHitObject<ManiaHitObject, ManiaJudgement> GetVisualRepresentation(ManiaHitObject h)
         {
-            var maniaPlayfield = (ManiaPlayfield)Playfield;
+            Bindable<Key> key = Playfield.Columns.ElementAt(h.Column).Key;
-
-            Bindable<Key> key = maniaPlayfield.Columns.ElementAt(h.Column).Key;
 
             var holdNote = h as HoldNote;
             if (holdNote != null)

osu.Game.Rulesets.Mania/UI/ManiaPlayfield.cs

@@ -15,12 +15,8 @@ using OpenTK.Input;
 using System.Linq;
 using System.Collections.Generic;
 using osu.Game.Rulesets.Objects.Drawables;
-using osu.Framework.Input;
 using osu.Game.Rulesets.Mania.Objects.Drawables;
-using osu.Game.Rulesets.Timing;
-using osu.Framework.Configuration;
 using osu.Framework.Graphics.Shapes;
-using osu.Framework.Extensions.IEnumerableExtensions;
 
 namespace osu.Game.Rulesets.Mania.UI
 {

osu.Game/Rulesets/Objects/Drawables/DrawableScrollingHitObject.cs

@@ -1,7 +1,6 @@
 // Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-using System;
 using osu.Framework.Configuration;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.Judgements;

osu.Game/Rulesets/Timing/LinearScrollingContainer.cs

@@ -2,7 +2,6 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using osu.Framework.Graphics;
-using osu.Game.Rulesets.Timing;
 
 namespace osu.Game.Rulesets.Timing
 {

osu.Game/Rulesets/UI/HitRenderer.cs

@@ -322,6 +322,7 @@ namespace osu.Game.Rulesets.UI
     /// <summary>
     /// A derivable HitRenderer that manages the Playfield and HitObjects.
     /// </summary>
+    /// <typeparam name="TPlayfield">The type of Playfield contained by this HitRenderer.</typeparam>
     /// <typeparam name="TObject">The type of HitObject contained by this HitRenderer.</typeparam>
     /// <typeparam name="TJudgement">The type of Judgement of DrawableHitObjects contained by this HitRenderer.</typeparam>
     public abstract class HitRenderer<TPlayfield, TObject, TJudgement> : HitRenderer<TObject, TJudgement>

osu.Game/Rulesets/UI/ScrollingPlayfield.cs

@@ -16,7 +16,7 @@ using osu.Game.Rulesets.Timing;
 namespace osu.Game.Rulesets.UI
 {
     /// <summary>
-    /// A type of <see cref="Playfield{TObject, TJudgement}"/> specialized towards scrolling <see cref="DrawableHitObjects"/>.
+    /// A type of <see cref="Playfield{TObject, TJudgement}"/> specialized towards scrolling <see cref="DrawableHitObject"/>s.
     /// </summary>
     public class ScrollingPlayfield<TObject, TJudgement> : Playfield<TObject, TJudgement>
         where TObject : HitObject
@@ -156,7 +156,7 @@ namespace osu.Game.Rulesets.UI
             }
 
             protected override Container<DrawableHitObject<TObject, TJudgement>> Content => content;
-            private Container<DrawableHitObject<TObject, TJudgement>> content;
+            private readonly Container<DrawableHitObject<TObject, TJudgement>> content;
 
             /// <summary>
             /// Hit objects that are to be re-processed on the next update.