qemu: don't shutdown event thread in monitor EOF callback

This hunk was introduced in [1] in order to avoid loosing
events from monitor on stopping qemu process. But as explained
in [2] on destroy we won't get neither EOF nor any other
events as monitor is just closed. In case of crash/shutdown
we won't get any more events as well and qemuDomainObjStopWorker
will be called by qemuProcessStop eventually. Thus let's
remove qemuDomainObjStopWorker from qemuProcessHandleMonitorEOF
as it is not useful anymore.

[1] e6afacb0f: qemu: start/stop an event loop thread for domains
[2] d2954c072: qemu: ensure domain event thread is always stopped

Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

src/qemu/qemu_process.c

@@ -323,9 +323,6 @@ qemuProcessHandleMonitorEOF(qemuMonitorPtr mon,
     qemuDomainDestroyNamespace(driver, vm);
 
  cleanup:
-    /* Now we got EOF we're not expecting more I/O, so we
-     * can finally kill the event thread */
-    qemuDomainObjStopWorker(vm);
     virObjectUnlock(vm);
 }