libvirt.spec: remove vbox storage and network .so files

Commit 55ea7be7 removed separated modules for vbox_network and
vbox_storage drivers but forget to update libvirt.spec.in file. This
patch will fix rpm build.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

libvirt.spec.in

@@ -2117,8 +2117,6 @@ exit 0
 %files daemon-driver-vbox
 %defattr(-, root, root)
 %{_libdir}/%{name}/connection-driver/libvirt_driver_vbox.so
-%{_libdir}/%{name}/connection-driver/libvirt_driver_vbox_network.so
-%{_libdir}/%{name}/connection-driver/libvirt_driver_vbox_storage.so
         %endif
     %endif # %{with_driver_modules}