qemu: Remove a redundant function call from qemuDomainGetPerfEvents

Calling virDomainObjUpdateModificationImpact directly inside the
function body is redundant, since the same function call is embedded
into virDomainObjGetOneDef.
Signed-off-by: NIlias Stamatis <stamatis.iliass@gmail.com>
Reviewed-by: NErik Skultety <eskultet@redhat.com>

src/qemu/qemu_driver.c

@@ -10339,9 +10339,6 @@ qemuDomainGetPerfEvents(virDomainPtr dom,
     if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
         goto cleanup;
 
-    if (virDomainObjUpdateModificationImpact(vm, &flags) < 0)
-        goto endjob;
-
     if (!(def = virDomainObjGetOneDef(vm, flags)))
         goto endjob;