Clean up warnings

spring-web/src/main/java/org/springframework/http/server/reactive/ServletHttpHandlerAdapter.java

@@ -55,7 +55,6 @@ import org.springframework.util.Assert;
  * @since 5.0
  * @see org.springframework.web.server.adapter.AbstractReactiveWebInitializer
  */
-@SuppressWarnings("serial")
 public class ServletHttpHandlerAdapter implements Servlet {
 
 	private static final Log logger = HttpLogging.forLogName(ServletHttpHandlerAdapter.class);

spring-web/src/test/java/org/springframework/web/multipart/commons/CommonsMultipartResolverTests.java

@@ -406,7 +406,6 @@ public class CommonsMultipartResolverTests {
 	}
 
 
-	@SuppressWarnings("serial")
 	private static class MockFileItem implements FileItem {
 
 		private String fieldName;