virsh: perf: Remove unnecessary 'error' label
virsh: perf: Remove unnecessary 'error' label

The only place that uses it doesn't warrant a separate label.

datto/libvirt,zippy2/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,zippy2/libvirt,zippy2/libvirt,libvirt/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,eskultety/libvirt,crobinso/libvirt,zippy2/libvirt,nertpinx/libvirt,taget/libvirt,olafhering/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,libvirt/libvirt,eskultety/libvirt,fabianfreyer/libvirt,taget/libvirt,andreabolognani/libvirt,olafhering/libvirt,datto/libvirt,olafhering/libvirt,taget/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,crobinso/libvirt,taget/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,nertpinx/libvirt,eskultety/libvirt,jardasgit/libvirt,crobinso/libvirt,crobinso/libvirt,libvirt/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,datto/libvirt,nertpinx/libvirt,taget/libvirt,olafhering/libvirt,VenkatDatta/libvirt,datto/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,jfehlig/libvirt,libvirt/libvirt,jfehlig/libvirt,andreabolognani/libvirt,datto/libvirt,jardasgit/libvirt,eskultety/libvirt,eskultety/libvirt