Removed redundant ignore attribute

IntegrationTests/CertificateValidation.cs

@@ -132,7 +132,6 @@ public class CertificateValidation {
 
     [Ignore("Not the scope of this branch - reactivate later")]
     [Test]
-    [Ignore("Not implemented")]
     public void CheckPemFiles() {
         var files = Directory.GetFiles("./certificates");
         var success = 0;