Remove extra line from license header

This commit removes an extra line from the license header on the file
EvilBootstrapCheckTests.java.

qa/evil-tests/src/test/java/org/elasticsearch/bootstrap/EvilBootstrapChecksTests.java

@@ -15,7 +15,6 @@
  * KIND, either express or implied.  See the License for the
  * specific language governing permissions and limitations
  * under the License.
- *
  */
 
 package org.elasticsearch.bootstrap;