xen: Remove droppings from a previous patch.

Signed-off-by: Keir Fraser <keir@xensource.com>

xen/common/domain.c

@@ -356,8 +356,6 @@ void domain_pause_for_debugger(void)
     send_guest_global_virq(dom0, VIRQ_DEBUGGER);
 }
 
-__attribute__ ((weak)) void domain_debug_state_changed(struct domain *d) { }
-
 /* Complete domain destroy after RCU readers are not holding old references. */
 static void complete_domain_destroy(struct rcu_head *head)
 {

xen/include/xen/sched.h

@@ -333,7 +333,6 @@ void domain_destroy(struct domain *d);
 void domain_kill(struct domain *d);
 void domain_shutdown(struct domain *d, u8 reason);
 void domain_pause_for_debugger(void);
-void domain_debug_state_changed(struct domain *d);
 
 /*
  * Mark specified domain as crashed. This function always returns, even if the