Remove all RequiredTypes usages

osu.Game.Tests/Visual/UserInterface/TestSceneLabelledTextBox.cs

@@ -1,8 +1,6 @@
 // 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 NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
@@ -14,11 +12,6 @@ namespace osu.Game.Tests.Visual.UserInterface
     [TestFixture]
     public class TestSceneLabelledTextBox : OsuTestScene
     {
-        public override IReadOnlyList<Type> RequiredTypes => new[]
-        {
-            typeof(LabelledTextBox),
-        };
-
         [TestCase(false)]
         [TestCase(true)]
         public void TestTextBox(bool hasDescription) => createTextBox(hasDescription);