Fix unnecessary @SupressWarnings annotations

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

@@ -157,7 +157,6 @@ public class BeanWrapperGenericsTests {
 		GenericBean<?> gb = new GenericBean<Object>();
 		BeanWrapper bw = new BeanWrapperImpl(gb);
 		bw.registerCustomEditor(Number.class, new CustomNumberEditor(Integer.class, false));
-		@SuppressWarnings("unchecked")
 		Map<String, Collection> input = new HashMap<String, Collection>();
 		HashSet<Integer> value1 = new HashSet<Integer>();
 		value1.add(new Integer(1));

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

@@ -974,7 +974,6 @@ public class ExtendedBeanInfoTests {
 	}
 
 	static class WithStaticWriteMethod {
-		@SuppressWarnings("unused")
 		public static void setProp1(String prop1) {
 		}
 	}

spring-beans/src/test/java/org/springframework/beans/factory/DefaultListableBeanFactoryTests.java

@@ -2200,7 +2200,6 @@ public class DefaultListableBeanFactoryTests {
 		doTestFieldSettingWithInstantiationAwarePostProcessor(true);
 	}
 
-	@SuppressWarnings("unchecked")
 	private void doTestFieldSettingWithInstantiationAwarePostProcessor(final boolean skipPropertyPopulation) {
 		DefaultListableBeanFactory lbf = new DefaultListableBeanFactory();
 		RootBeanDefinition bd = new RootBeanDefinition(TestBean.class);