diff --git a/src/test/kotlinR8TestResources/lambdas_singleton/Lambdas.java b/src/test/kotlinR8TestResources/lambdas_singleton/Lambdas.java
deleted file mode 100644
index 4140293..0000000
--- a/src/test/kotlinR8TestResources/lambdas_singleton/Lambdas.java
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright (c) 2018, the R8 project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-public class Lambdas {
-  public interface Function<R, P1, P2> {
-    R get(P1 a, P2 b);
-  }
-
-  public synchronized static <R, P1, P2> void accept(Function<R, P1, P2> s, P1 a, P2 b) {
-    System.out.println(s.get(a, b));
-  }
-}