Polish

spring-boot-samples/spring-boot-sample-secure/src/test/java/sample/ops/ui/SampleSecureApplicationTests.java

@@ -57,7 +57,7 @@ public class SampleSecureApplicationTests {
 						new Callable<ConfigurableApplicationContext>() {
 							@Override
 							public ConfigurableApplicationContext call() throws Exception {
-								return (ConfigurableApplicationContext) SpringApplication
+								return SpringApplication
 										.run(SampleSecureApplication.class);
 							}
 						});