Remove extra params on prePassivate() and postActivate()

According to spec:
http://docs.oracle.com/javaee/7/api/javax/ejb/PostActivate.html
http://docs.oracle.com/javaee/7/api/javax/ejb/PrePassivate.html
> If the method to which this annotation is applied is defined on a target class, it must have the following signature:
> 'void \<METHOD\>()'

Simply need to remove params on these two methods.