Remove highly unnecessary testcase

osu.Game.Tests/Visual/TestCaseEditorSetupCircularButton.cs

@@ -1,45 +0,0 @@
-// Copyright (c) 2007-2018 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.Framework.Allocation;
-using osu.Framework.Graphics.Containers;
-using osu.Game.Screens.Edit.Screens.Setup.Components;
-using OpenTK;
-
-namespace osu.Game.Tests.Visual
-{
-    public class TestCaseEditorSetupCircularButton : OsuTestCase
-    {
-        [BackgroundDependencyLoader]
-        private void load()
-        {
-            Child = new FillFlowContainer
-            {
-                Anchor = Anchor.Centre,
-                Origin = Anchor.Centre,
-                AutoSizeAxes = Axes.Both,
-                Direction = FillDirection.Vertical,
-                Children = new[]
-                {
-                    new SetupCircularButton { Text = "Default" },
-                    new SetupCircularButton
-                    {
-                        Width = 200,
-                        Text = "Wide",
-                    },
-                    new SetupCircularButton
-                    {
-                        Height = 100,
-                        Text = "High"
-                    },
-                    new SetupCircularButton
-                    {
-                        Size = new Vector2(200, 100),
-                        Text = "Wide 'n' High"
-                    }
-                }
-            };
-        }
-    }
-}