Reduce unnecessary use of aspectj as a build dependency

samples/tutorial/src/main/java/bigbank/BankServiceImpl.java

@@ -1,15 +1,10 @@
 package bigbank;
 
-import org.aspectj.lang.annotation.Pointcut;
 import org.springframework.util.Assert;
 
 public class BankServiceImpl implements BankService {
     private final BankDao bankDao;
 
-    // Not used unless you declare a <protect-pointcut>
-    @Pointcut("execution(* bigbank.BankServiceImpl.*(..))")
-    public void myPointcut() {}
-
     public BankServiceImpl(BankDao bankDao) {
         Assert.notNull(bankDao);
         this.bankDao = bankDao;