qemu: drop write-only agentStart

src/qemu/qemu_domain.c

@@ -3646,7 +3646,6 @@ qemuDomainObjEnterAgent(virDomainObjPtr obj)
               priv->agent, obj, obj->def->name);
     virObjectLock(priv->agent);
     virObjectRef(priv->agent);
-    ignore_value(virTimeMillisNow(&priv->agentStart));
     virObjectUnlock(obj);
 }
 
@@ -3670,7 +3669,6 @@ qemuDomainObjExitAgent(virDomainObjPtr obj)
     VIR_DEBUG("Exited agent (agent=%p vm=%p name=%s)",
               priv->agent, obj, obj->def->name);
 
-    priv->agentStart = 0;
     if (!hasRefs)
         priv->agent = NULL;
 }

src/qemu/qemu_domain.h

@@ -178,7 +178,6 @@ struct _qemuDomainObjPrivate {
 
     qemuAgentPtr agent;
     bool agentError;
-    unsigned long long agentStart;
 
     bool gotShutdown;
     bool beingDestroyed;

src/qemu/qemu_process.c

@@ -231,7 +231,6 @@ qemuConnectAgent(virQEMUDriverPtr driver, virDomainObjPtr vm)
      * deleted while the agent is active */
     virObjectRef(vm);
 
-    ignore_value(virTimeMillisNow(&priv->agentStart));
     virObjectUnlock(vm);
 
     agent = qemuAgentOpen(vm,
@@ -239,7 +238,6 @@ qemuConnectAgent(virQEMUDriverPtr driver, virDomainObjPtr vm)
                           &agentCallbacks);
 
     virObjectLock(vm);
-    priv->agentStart = 0;
 
     if (agent == NULL)
         virObjectUnref(vm);