Clean up warnings in spring-test

spring-test/src/main/java/org/springframework/test/web/reactive/server/DefaultWebTestClient.java

@@ -57,7 +57,6 @@ import static org.springframework.test.util.AssertionErrors.assertTrue;
 import static org.springframework.web.reactive.function.BodyExtractors.toFlux;
 import static org.springframework.web.reactive.function.BodyExtractors.toMono;
 
-
 /**
  * Default implementation of {@link WebTestClient}.
  *
@@ -476,7 +475,6 @@ class DefaultWebTestClient implements WebTestClient {
 		}
 
 		@Override
-		@SuppressWarnings("unchecked")
 		public EntityExchangeResult<List<E>> returnResult() {
 			return getResult();
 		}

spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/JsonContentTests.java

@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.springframework.test.web.reactive.server.samples;
 
 import java.net.URI;
@@ -32,6 +33,7 @@ import org.springframework.web.bind.annotation.RestController;
  * Samples of tests with serialized JSON content.
  *
  * @author Rossen Stoyanchev
+ * @since 5.0
  */
 public class JsonContentTests {
 
@@ -71,7 +73,6 @@ public class JsonContentTests {
 
 
 	@RestController
-	@SuppressWarnings("unused")
 	static class PersonController {
 
 		@GetMapping("/persons")

spring-test/src/test/java/org/springframework/test/web/reactive/server/samples/ResponseEntityTests.java

@@ -44,7 +44,6 @@ import static org.junit.Assert.assertThat;
 import static org.springframework.core.ResolvableType.forClassWithGenerics;
 import static org.springframework.http.MediaType.TEXT_EVENT_STREAM;
 
-
 /**
  * Annotated controllers accepting and returning typed Objects.
  *
@@ -133,7 +132,6 @@ public class ResponseEntityTests {
 
 	@RestController
 	@RequestMapping("/persons")
-	@SuppressWarnings("unused")
 	static class PersonController {
 
 		@GetMapping("/{name}")