Spring Cleaning in December

- Delete unused imports
- Delete unused code
- Clean up warnings

spring-tx/src/test/java/org/springframework/transaction/annotation/EnableTransactionManagementTests.java

@@ -94,6 +94,7 @@ public class EnableTransactionManagementTests {
 	 * get loaded -- or in this case, attempted to be loaded at which point the test fails.
 	 */
 	@Test
+	@SuppressWarnings("resource")
 	public void proxyTypeAspectJCausesRegistrationOfAnnotationTransactionAspect() {
 		try {
 			new AnnotationConfigApplicationContext(EnableAspectJTxConfig.class, TxManagerConfig.class);