"If a session bean is a stateful session bean, and the scope is not @Dependent, the application may not directly call any EJB remove method of any instance of the session bean. If the application directly calls an EJB remove method of any contextual instance of a session bean that is a stateful session bean and declares any scope other than @Dependent, an UnsupportedOperationException is thrown"

JBT should warn or error if a user does this.