Clean up warnings

spring-beans/src/test/java/org/springframework/beans/DirectFieldAccessorTests.java

@@ -41,7 +41,6 @@ public class DirectFieldAccessorTests extends AbstractPropertyAccessorTests {
 	public void withShadowedField() {
 		final StringBuilder sb = new StringBuilder();
 
-		@SuppressWarnings("serial")
 		TestBean target = new TestBean() {
 			@SuppressWarnings("unused")
 			StringBuilder name = sb;

spring-beans/src/test/java/org/springframework/tests/sample/beans/Colour.java

@@ -20,7 +20,6 @@ package org.springframework.tests.sample.beans;
  * @author Rob Harrop
  * @author Juergen Hoeller
  */
-@SuppressWarnings("serial")
 public class Colour {
 
 	public static final Colour RED = new Colour("RED");