Remove old nunit artifact

Oren Novotny · Oren Novotny · commit b0d14dec810b · 2019-01-25T16:26:00.000-05:00
diff --git a/crypto/test/src/crmf/test/CrmfTest.cs b/crypto/test/src/crmf/test/CrmfTest.cs
@@ -1,6 +1,5 @@
 ﻿using System;
 using System.Collections;
-using NUnit.Core;
 using NUnit.Framework;
 using Org.BouncyCastle.Asn1;
 using Org.BouncyCastle.Asn1.Cms;
