diff --git a/src/Avalonia.Animation/IAnimationSetter.cs b/src/Avalonia.Animation/IAnimationSetter.cs
index d916f19370..2d22377286 100644
--- a/src/Avalonia.Animation/IAnimationSetter.cs
+++ b/src/Avalonia.Animation/IAnimationSetter.cs
@@ -1,5 +1,3 @@
-using System;
-
 namespace Avalonia.Animation
 {
     public interface IAnimationSetter