Remove now unused files

osu.Game/Graphics/UserInterface/SlimEnumDropdown.cs

@@ -0,0 +1,44 @@
+// 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 osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.UserInterface;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Graphics.UserInterface
+{
+    public class SlimEnumDropdown<T> : OsuEnumDropdown<T>
+        where T : struct, Enum
+    {
+        protected override DropdownHeader CreateHeader() => new SlimDropdownHeader();
+
+        protected override DropdownMenu CreateMenu() => new SlimMenu();
+
+        private class SlimDropdownHeader : OsuDropdownHeader
+        {
+            public SlimDropdownHeader()
+            {
+                Height = 25;
+                Icon.Size = new Vector2(16);
+                Foreground.Padding = new MarginPadding { Top = 4, Bottom = 4, Left = 8, Right = 4 };
+            }
+
+            protected override void LoadComplete()
+            {
+                base.LoadComplete();
+                BackgroundColour = Color4.Black.Opacity(0.25f);
+            }
+        }
+
+        private class SlimMenu : OsuDropdownMenu
+        {
+            public SlimMenu()
+            {
+                BackgroundColour = Color4.Black.Opacity(0.7f);
+            }
+        }
+    }
+}