update samples.

samples/Sample.RabbitMQ.MySql/Startup.cs

@@ -30,8 +30,6 @@ namespace Sample.RabbitMQ.MySql
         public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
         {
             app.UseMvc();
-
-            app.UseCap();
         }
     }
 }