Remove even more Author(s): lines from source files

In 600462834f we've tried to remove Author(s): lines
from comments at the beginning of our source files. Well, in some
files while we removed the "Author" line we did not remove the
actual list of authors.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>

tools/virt-admin-completer.h

@@ -16,9 +16,6 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library.  If not, see
  * <http://www.gnu.org/licenses/>.
- *
- *  Michal Privoznik <mprivozn@redhat.com>
- *
  */
 
 #ifndef LIBVIRT_VIRT_ADMIN_COMPLETER_H