conf: disk: Remove error label from virDomainDiskDefIotuneParse
conf: disk: Remove error label from virDomainDiskDefIotuneParse

Since this function isn't doing any cleanup, the label is not necessary.

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