Remove obsolete test

src/NFluent/Messages/InstanceBlock.cs

@@ -69,12 +69,14 @@ public string GetMessage()
             var builder = new StringBuilder();
             builder.Append("an instance");
 
-            if (this.type != null)
+            if (this.type == null)
             {
-                var temp = this.fullTypeName ? this.type.AssemblyQualifiedName : this.type.ToStringProperlyFormatted();
-                builder.AppendFormat(" of type: [{0}]", temp);
+                return builder.ToString();
             }
 
+            var temp = this.fullTypeName ? this.type.AssemblyQualifiedName : this.type.ToStringProperlyFormatted();
+            builder.AppendFormat(" of type: [{0}]", temp);
+
             return builder.ToString();
         }
 

tests/NFluent.Tests.Internals/FluentMessageTests.cs

@@ -44,14 +44,6 @@ public void BasicTest()
             Assert.AreEqual(NewLine + "The checked string is ok.", message);
         }
 
-        [Test]
-        public void BlockFailTest()
-        {
-            // ReSharper disable once ObjectCreationAsStatement
-            Check.ThatCode(() => { new MessageBlock(null, null, null); })
-            .Throws<ArgumentNullException>();
-        }
-
         [Test]
         public void CheckedBlockTest()
         {