qemuMigrationPrepareAny: Drop useless variable @now

As of eeb008db the variable is not used anymore. Drop it.
Signed-off-by: NWang Yufei <james.wangyufei@huawei.com>
Signed-off-by: NZhang Bo <oscar.zhangbo@huawei.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_migration.c

@@ -2913,7 +2913,6 @@ qemuMigrationPrepareAny(virQEMUDriverPtr driver,
     int ret = -1;
     int dataFD[2] = { -1, -1 };
     qemuDomainObjPrivatePtr priv = NULL;
-    unsigned long long now;
     qemuMigrationCookiePtr mig = NULL;
     bool tunnel = !!st;
     char *xmlout = NULL;
@@ -2923,9 +2922,6 @@ qemuMigrationPrepareAny(virQEMUDriverPtr driver,
     bool abort_on_error = !!(flags & VIR_MIGRATE_ABORT_ON_ERROR);
     bool taint_hook = false;
 
-    if (virTimeMillisNow(&now) < 0)
-        return -1;
-
     virNWFilterReadLockFilterUpdates();
 
     if (flags & VIR_MIGRATE_OFFLINE) {