cleanup: removed a meaningless $Id$ line.

git-svn-id: svn://bind10.isc.org/svn/bind10/trunk@3754 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/dns/tests/tsigkey_unittest.cc

@@ -12,8 +12,6 @@
 // OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 // PERFORMANCE OF THIS SOFTWARE.
 
-// $Id: rrtype_unittest.cc 476 2010-01-19 00:29:28Z jinmei $
-
 #include <string>
 
 #include <gtest/gtest.h>