Fix build error

test/DotNetCore.CAP.Test/CAP.BuilderTest.cs

@@ -39,19 +39,6 @@ namespace DotNetCore.CAP.Test
             Assert.NotNull(markService);
         }
 
-        [Fact]
-        public void CanOverridePublishService()
-        {
-            var services = new ServiceCollection();
-            services.AddCap(x => { }).AddProducerService<MyProducerService>();
-
-            var thingy = services.BuildServiceProvider()
-                .GetRequiredService<ICapPublisher>() as MyProducerService;
-
-            Assert.NotNull(thingy);
-        }
-      
-
         [Fact]
         public void CanResolveCapOptions()
         {