libvirt.spec: Don't expect virt-admin in libvirt-admin yet

While Martin introduced the binary (and its manpage) in commit
4e7ccf87 it was pushed by mistake. Therefore it was reverted in
220393bf. The problem is, the original commit was not quite right
as the binary was added into the spec file in a different commit:
55e0c840. So as long as the binary does not exist, we must remove it
from the spec file too.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

libvirt.spec.in

@@ -2221,8 +2221,6 @@ exit 0
 
 %files admin
 %defattr(-, root, root)
-%{_mandir}/man1/virt-admin.1*
-%{_bindir}/virt-admin
 %{_libdir}/libvirt-admin.so.*
 
 %files client -f %{name}.lang