fixed checkstyle

cas-server-core/src/test/java/org/jasig/cas/TestUtils.java

@@ -46,7 +46,6 @@ import org.jasig.cas.services.support.RegisteredServiceRegexAttributeFilter;
 import org.jasig.cas.validation.Assertion;
 import org.jasig.cas.validation.ImmutableAssertion;
 import org.jasig.services.persondir.IPersonAttributeDao;
-import org.jasig.services.persondir.IPersonAttributes;
 import org.jasig.services.persondir.support.StubPersonAttributeDao;
 import org.jasig.services.persondir.support.merger.NoncollidingAttributeAdder;
 import org.springframework.mock.web.MockHttpServletRequest;
@@ -60,7 +59,6 @@ import java.net.MalformedURLException;
 import java.net.URL;
 import java.security.SecureRandom;
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;