Remove redundant @Aspect from CodeStyleAspect.aj

This has been present for quite some time, and compilation at the
command line was never a problem.  However, after upgrading to
STS 2.3.3.M2, errors started appearing in the Problems tab about
'duplicate @Aspect annotations'.  This message was a bit misleading
given that the underlying issue is that applying an @Aspect annotation
on an aspect declared in .aj style is redundant.  Andy Clement is
investigating as well, but for now the reason for the change in behavior
remains a mystery.

org.springframework.aspects/src/test/java/org/springframework/aop/aspectj/autoproxy/CodeStyleAspect.aj

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2007 the original author or authors.
+ * Copyright 2002-2010 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,12 +16,9 @@
 
 package org.springframework.aop.aspectj.autoproxy;
 
-import org.aspectj.lang.annotation.Aspect;
-
 /**
  * @author Adrian Colyer
  */
-@Aspect
 public aspect CodeStyleAspect {
 
 	private String foo;