qemuDomainObjBeginJobInternal: Remove spurious @ret assignment

The variable is initialized to -1 already. There's no way it can
be overwritten by the time control gets to the line I'm removing.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

src/qemu/qemu_domain.c

@@ -6490,7 +6490,6 @@ qemuDomainObjBeginJobInternal(virQEMUDriverPtr driver,
     else
         blocker = priv->job.asyncOwnerAPI;
 
-    ret = -1;
     if (errno == ETIMEDOUT) {
         if (blocker) {
             virReportError(VIR_ERR_OPERATION_TIMEOUT,