diff --git a/osu.Game/Screens/Edit/Screens/Compose/Layers/MaskContainer.cs b/osu.Game/Screens/Edit/Screens/Compose/Layers/MaskContainer.cs
index 993594f1d2..df2691c28e 100644
--- a/osu.Game/Screens/Edit/Screens/Compose/Layers/MaskContainer.cs
+++ b/osu.Game/Screens/Edit/Screens/Compose/Layers/MaskContainer.cs
@@ -4,7 +4,6 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using JetBrains.Annotations;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Input;
@@ -54,7 +53,7 @@ namespace osu.Game.Screens.Edit.Screens.Compose.Layers
             drawable.DragRequested += onDragRequested;
         }
 
-        public override bool Remove([NotNull] HitObjectMask drawable)
+        public override bool Remove(HitObjectMask drawable)
         {
             if (drawable == null) throw new ArgumentNullException(nameof(drawable));