1 files changed, 0 insertions, 13 deletions
diff --git a/src/mscorlib/src/System/IObserver.cs b/src/mscorlib/src/System/IObserver.cs
deleted file mode 100644
index 39e123de8d..0000000000
--- a/src/mscorlib/src/System/IObserver.cs
+++ /dev/null
@@ -1,13 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-namespace System
-{
-    public interface IObserver<in T>
-    {
-        void OnNext(T value);
-        void OnError(Exception error);
-        void OnCompleted();
-    }
-}