qemu: hotplug: Remove pre-blockdev code path from qemuDomainChangeEjectableMedia
qemu: hotplug: Remove pre-blockdev code path from qemuDomainChangeEjectableMedia

All media are changed in blockdev-instantiated cdroms now, remove the
old code.

Signed-off-by: Peter Krempa <2cf5c04c61aa466e4a47bfedc747d17279c72ffc@redhat.com>
Reviewed-by: Pavel Hrdina <d4772d05997b8abf035041e3b4f4996380ea7e7a@redhat.com>
Reviewed-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>

zippy2/libvirt,libvirt/libvirt,libvirt/libvirt,jfehlig/libvirt,zippy2/libvirt,jfehlig/libvirt,olafhering/libvirt,olafhering/libvirt,olafhering/libvirt,libvirt/libvirt,olafhering/libvirt,zippy2/libvirt,jfehlig/libvirt,libvirt/libvirt,jfehlig/libvirt,zippy2/libvirt